Answer:
Use properties:
cos(-θ) = cosθcos(θ + π) = - cosθsin²θ + cos²θ = 1Solution:
cosθ/(1 - sinθ) - (-cosθ)/(1 + sinθ) = cosθ([1/(a- sinθ) + 1/(1 + sinθ)] = cosθ[(1 + sinθ + 1 - sinθ)/(1 - sin²θ)] = cosθ(2/cos²θ) = 2/cosθProved
[tex]\boxed{\large{\bold{\textbf{\textsf{{\color{blue}{Answer}}}}}}:)}[/tex]
[tex]\sf{\dfrac{cos( - \theta)}{1 - sin \theta} - \dfrac{cos( \theta + \pi)}{1 + sin \theta} }[/tex][tex]\\[/tex]
[[tex]\tt{cos(-\theta)=cos\theta }[/tex] ]
[tex]\sf{\dfrac{cos \theta}{1 - sin \theta} - \dfrac{cos( \theta + \pi)}{1 + sin \theta}}[/tex][tex]\\[/tex]
[[tex]\tt{cos(\theta+\pi)=-cos\theta }[/tex] ]
[tex]\sf{\dfrac{cos \theta}{1 - sin \theta} - \dfrac{-cos\theta }{1 + sin \theta}}[/tex] [tex]\sf{\dfrac{cos \theta}{1 - sin \theta} + \dfrac{cos\theta }{1 + sin \theta}}[/tex][tex]\\[/tex]
[tex]\sf{cos\theta(\dfrac{1}{1-sin\theta}+\dfrac{1}{1+sin\theta} ) }[/tex][tex]\sf{cos\theta(\dfrac{1+sin\theta+1-sin\theta}{(1)^2-(sin\theta)^2 })}[/tex][tex]\sf{cos\theta(\dfrac{1\cancel{+sin\theta}+1\cancel{-sin\theta}}{(1)^2-(sin\theta)^2 })}[/tex][tex]\sf{cos\theta(\dfrac{2}{1-sin^2\theta })}[/tex][tex]\\[/tex]
[[tex]\tt{1-sin^2\theta=cos^2\theta }[/tex] ]
[tex]\sf{cos\theta(\dfrac{2}{cos^2\theta })}[/tex][tex]\sf{cos\theta(\dfrac{2}{cos\theta×cos\theta })}[/tex][tex]\sf{\cancel{cos\theta}×(\dfrac{2}{cos\theta×\cancel{cos\theta} })}[/tex][tex]\sf{\dfrac{2}{cos\theta} }[/tex][tex]\sf{ }[/tex]
[tex]\sf{ }[/tex]
[tex] \therefore{ \frac{cos( - \theta)}{1 - sin \theta} - \frac{cos( \theta + \pi)}{1 + sin \theta} = \frac{2}{cos \theta} }[/tex](proved)
can someone explain and show the work for me, i’m so confused on it!
Answer:
26π
Step-by-step explanation:
The equation for circumference is
c = 2πr
using r = 13
c = 2π(13)
Rearrange
c = 2(13)π
Simplify
c = 26π
Answer:
the answer is 26tt
good luck
3
What is the quotient of -3/8 and -1/3
Answer:
the answer is -1 1/8
Step-by-step explanation:
-3/8 ÷-1/3
= -3/8×3/-1
= -3 × 3
8 × -1
= 9/8
= -1 1/8
The length of the arc of semi circle is 15 cm calculate the area of the semi circle ?
Answer:
The area of the semi-circle is 35.8 cm².
Step-by-step explanation:
The length of the arc is given by:
[tex] s = r\theta [/tex] (1)
Where:
s: is the length of the arc of semi-circle = 15 cm
r: is the radius
θ: is the angle in radians
Since we need to calculate the area of the semi-circle, the angle is:
[tex] \theta = \frac{360}{2} = 180 = \pi [/tex]
From equation (1) we can find the radius:
[tex] r = \frac{s}{\theta} = \frac{15}{\pi} [/tex]
Now, the area of the semi-circle is:
[tex] A = \frac{\pi r^{2}}{2} = \frac{\pi (\frac{15}{\pi})^{2}}{2} = 35.8 cm^{2} [/tex]
Therefore, the area of the semi-circle is 35.8 cm².
I hope it helps you!
An ice cream shop offers 6 different flavors of ice cream and 11
different toppings. How many choices are possible for a single
serving of ice cream with one topping?
Answer:
66
Step-by-step explanation:
Since these two events are independent, multiply the two probabilities together:
6*11 = 66 (choices)
Which of the following topics is the Broadest?
Kyrie Irving's trade request
The movement of free-agent players
The NBA draft
Answer:
Step-by-step explanation:
its nba and kyrie
Answer:
nba aND KYRIE
Step-by-step explanation:
A polling organization announces that the proportion of American voters who favor congressional term limits is 64 percent, with 95% confidence and margin of error of 3 percent. This means that
Answer:
We are 95% confident that the proportion of American voters who favor congressional term limits is 64 percent with a difference of 3% for small sample size.
Step-by-step explanation:
95 % confidence means that we are 95 % confident that the the proportion of American voters who favor congressional term limits is 64 percent.
95 % confidence means that of all the sample about 95 % values are within in the given range.
And only 5% sample are not included in the given parameter.
Margin of error is the amount of miscalculation or difference in change of circumstances from the obtained data.
3% margin of error usually occurs when the data size is small.
As the data size increases the margin of error decreases.
So this statement tells us that we are 95% confident that the proportion of American voters who favor congressional term limits is 64 percent with a difference of 3% for small sample size.
Margin of error= z *σ/√n→
This indicates that as the sample size decreases the margin of error increases and vice versa.
the solution to the equation x+5= -9 is
Answer:
x = -14
Step-by-step explanation:
-9 -5 = -14
Washington Middle School has a supply store for students. The graph shows the total sales of the supply store for each month over the school year.
525
450
375
Total Sales (dollars)
300-
225
150
75+
0
10
Month
What is the rate of change in total sales from month 8 to month 9?
O A. -100 dollars per month
OB. -75 dollars per month
C.-50 dollars per month
оо
OD. -25 dollars per month
Answer:
B??
Step-by-step explanation:
It is a little hard to understand because of hot it looks, BUT 300-225 is 75, 225-150=75, 150-75=75,75-70=75
Please help me pick the right answer
....................................................................
Answer:
its C
Step-by-step explanation:
5x+2+4x-3=9x-1
hopefully its helpful
HELP ME PLEASE PLEASE PLEASE PLEASEEEEEEEEEEEEE
Use the function f(x) to answer the questions:
f(x) = 2x2 − 5x + 3
Part A: What are the x-intercepts of the graph of f(x)? Show your work. (2 points)
Part B: Is the vertex of the graph of f(x) going to be a maximum or a minimum? What are the coordinates of the vertex? Justify your answers and show your work. (3 points)
Part C: What are the steps you would use to graph f(x)? Justify that you can use the answers obtained in Part A and Part B to draw the graph. (5 points)
Answer:
part A: x= 1 and x= 3/2
part B: minimum at (5/4, f(5/4))
Step-by-step explanation:
part A: factoring
0 = 2x^2 - 5x + 3
= (2x^2 - 2x)(-3x + 3)
= 2x(x - 1) -3(x-1)
= (2x - 3)(x - 1)
x= 1 and x= 3/2
part B: candidates test
find the derivative of the function.
f(x) = 2x^2 - 5x + 3
f'(x) = 4x -5
solve for critical numbers.
0 = 4x - 5
x = 5/4
candidates test by plugging in numbers into the derivative to see if that area is negative or pos.
f has a minimum at x = 5/4 because f' goes from neg to pos there. to find the coordinate for x = 5/4 just plug it into the original function to find f(5/4).
Part C: to draw the graph, I'd just plot the vertex coordinate that you solved for in part B, then I would plot the x intercepts that you solved for in part a, from there just draw a line throu the 3 points. (it should look like a U shape)
1 Pound = 16 ounces
2 Pounds 6 Ounces = blank ounces
[tex]\huge{\textbf{\textsf{{\color{navy}{An}}{\purple{sw}}{\pink{er}} {\color{pink}{:}}}}}[/tex]
38 ounces.Thanks.Hope it helps.Answer:
32 ounces........
..
Step-by-step explanation:
.................What ideas do you have about what makes Anchorage, Alaska, cooler than Christchurch, New Zealand?
+Science
Answer:
You can explore a variety of things in Alaska. There are so many activities you could do such as visiting museums and hiking and tons more. The thing about this is that it is out in the wilderness which makes it more exciting and cooler to see nature more than it does in new zealand. The climate can be pretty chilly in Alaska but it is way much fun to see tons of glaciers. New zealand has eathquakes frequently whilst Alaska doesn't.
Helppppppppp! Pleeeeeeeeeaaaaaaaase!
Answer: (7) I think
Step-by-step explanation:
Which is the value of (3+1)-(3-1)?
A. -1
o
B. 0
C. 2
C
D. 2i
O E 6+21
Please help with very easy math teach me to understand and I'll give brainliest
Answer:
B
Step-by-step explanation:
since a²+b²=c²
this is proven correct in answer B
As;
(8^0.5)² +(3)²=(17^0.5)²
What is 52% of 475?
Help please
Answer:
247
Step-by-step explanation:
0.52x475=247
i hope this helps :)
Answer:
The answer is 247 because 52% of 475 is 247
Find the slope of the line that passes through (1, 10) and (9, 9).
Answer:
Step-by-step explanation:
Use the slope formula=
y2-y1 / x2-x1
the answer is
(-1,8)
How do I solve these problems?
Consider the function f (x) = StartLayout Enlarged left-brace first row negative StartFraction 4 x Over x minus 3 EndFraction, x less-than 5 second row negative 7 x + 25, x greater-than 5 EndLayout. Which type of discontinuity occurs at x = 5? mixed infinite endpoint removable
Answer:
Its removable
Step-by-step explanation:
yes
this is a removable discontinuity
Here we have the piecewise function:
[tex]f(x) = \frac{-4x}{x - 3}[/tex] if x < 5
[tex]f(x) = -7x + 25[/tex] if x > 5.
We want to see which type of discontinuity we have at x = 5.
Remember that:
If we have two asymptotes, then is an infinite discontinuity
if just one point is missing, then it is a removable discontinuity
If the value drastically changes after the discontinuity, then its a jump discontinuity
Mixed case is when two of these happen.
Because we have a piecewise function, we need to evaluate both parts in x = 5.
If both parts give the same value, then we will have a removable discontinuity
if the values are different, then we have a jump discontinuity.
first part:
f(5) = -4×5/(5 - 3) = -20/2 = -10
second part:
f(5) = -7×5 + 25 = -35 + 25 = -10
So we got the same value, which means that this is a removable discontinuity
in the image below you can see the graph of the piecewise function, and see that as x tends to 5, both sides of the function tend to the same value.
if you want to read more about this,, you can see:
https://brainly.com/question/17317969
Which of the following is the equation of a parabola with the focus at (0, 3/4) and the directrix y = -3/4?
Answer:
do you have the picture I actually understand it if I see it in pictures .
Find the area of the following triangle: 17 9 14 10 Note: Figure not to scale.
Answer:
I believe 76.5 is the area to the triangle above.
Answer:
76.5
Step-by-step explanation:
the area is half the base× tge height so 1/2 (17)×9
Written as a simplified polynomial in standard form, what is the result when (3x+7)^2 is subtracted from 3?
Given:
[tex](3x+7)^2[/tex] is subtracted from 3.
To find:
The result of the given statement in the standard form of the polynomial.
Solution:
We need to find the result when [tex](3x+7)^2[/tex] is subtracted from 3.
So, the resulted polynomial can be written as:
[tex]P(x)=3-(3x+7)^2[/tex]
On simplification, we get
[tex]P(x)=3-((3x)^2+2(3x)(7)+(7)^2)[/tex] [tex][\because (a+b)^2=a^2+2ab+b^2][/tex]
[tex]P(x)=3-(9x^2+42x+49)[/tex]
[tex]P(x)=3-9x^2-42x-49[/tex]
[tex]P(x)=-9x^2-42x-46[/tex]
Therefore, the resulted polynomial in standard form is [tex]-9x^2-42x-46[/tex].
The ratio of two siblings current age is 1/2. In ten years the ratio of their ages will be 3/4. How old are they now?
Answer: 3:5
Step-by-step explanation: heres the answer
1
What is the value of 3 divided by
2
Answer:
1.5
Step-by-step explanation:
Answer:
1.5
Step-by-step explanation:
its pretty simple- 1 + 1 = 2 .5 + .5 = 1 2 + 1 = 3
Please help me!!!!!!!!!!!!
Answer:
16.03
Step-by-step explanation:
Please help! I will give Brainliest!
Answer:
a. 5/12
Step-by-step explanation:
there are 5 vowels out of 12 letters
What is 2^4 in standard form?
Answer:
2^4=16
Step-by-step explanation:
2^4 is equal to 2x2x2x2 which is equal to 4x2x2 which is equal to 8x2 which is equal to 16. Therefore, 2^4 is equal to 16.
If this has helped you please mark as brainliest
Find the missing angle...
Answer:
15 degrees
Step-by-step explanation:
Because you add 115 and 50 to get 165. And we know that a triangles angles when added up will equal 180. So you subtract 180 and 165 to get 15 degrees, your missing angle!
Hope this helps!
the way you speak, or your ___, Can let others know how you are feeling
A.tone
B.emotion
C.voice
D.language
Answer:
A, tone
Tone can also be used in poetry or writing to set the mood. It's kinda like your attitude, so this is the best answer.
Step-by-step explanation:
Answer:
Tone
Step-by-step explanation:
Tone matters more than word choice.
Help ejejsisjensisne ndjzjene Enid we ejsisbenejeusbw
Answer:
its C bro
its have to be 1-sin2x
because (sinx-cosx)² equal sin²x+cos²x-2×sinx×cosx