121 Answered Questions for the topic Sine

11/30/15

Using algebra to prove identities
Use algebra to prove the identity: cos(x)/1-sin(x) − tan(x) = 1 cos(x)
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11/30/15

Find the exact value of sin
Find the exact value of: sin(75?)
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11/22/15

2sin(pi/3x) =sqrt2
Find all solutions on the interval 0< (or equal to) theta < 2pi   Help! Show steps please. thanks
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11/22/15

2cos (3t) = -1
Help!! Find all solutions. Please show steps.   Thank you!
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11/21/15

Prove 2sec^2(t) = (1-sin(t) /cos^2(t)) + (1 / (1-sin(t)))
Please simplify the (1-sinT / cos^2T) + (1/(1 - sin(t))) side.   I did the problem just didn't know all of the right steps and just assumed..   Please help! Thanks!
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11/21/15

Simplify (1+sin(t)) / (1+csc(t))
I understand you get on the denominator (1+(1/sin(t))  I don't know how to simplify from there.   please help! Thanks!
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11/10/15

Cos 16pi/9 cos 10pi/9 + sin 16pi/9 sin 10pi/9
I don't know how to solve
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10/29/15

Sine and Cosine with angles
Find an angle θ, with 0? < θ < 360?, that has the same: (a) Cosine as 240? (b) Sine as 240?
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10/28/15

Using the pythagorean identity, find the value of sin? and tan? if cos?= -1/2
Using the pythagorean identity, find the value of sin⊗ and tan⊗ if cos⊗= -1/2
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10/28/15

Explain why sin?^2 + cos?^2=1
Explain why sin⊗2 + cos⊗2=1
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10/25/15

trig. unit circle? HElp???
Find the radian measure of the central angle of a circle of radius 96 km that intercepts an arc of length 294 km. Answer in units of rad
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06/16/15

If f( ? ) = sin ?, what is f(5p /3)?
The π  next to the 5 is pi. pls explain
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06/02/15

answer this please
The population of rabbits follows the curve represented by the equation: R=500 sin 1/2pie(m+3)+100 How many rabbits will be present in 38 months?
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05/21/15

Suppose ? is an angle in standard position
Suppose θ is an angle in standard position And cos θ=-1/2 and sinθ=-square root of 3 over 2. Can the value of θ be 60 degrees? Can it be -120 degrees ? 
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Sine

05/14/15

Find the exact value of: sin(7pi/6 + 3pi/4)
Find the exact value of: sin(7pi/6 + 3pi/4)
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05/08/15

sin^2x=5 has how many solutions on the interval 0 less than or equal to x less than or equal to 2pi?
A.0 B.2 C.1 D.Infinity   I need a step by step on how to do this.
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04/29/15

What are the x-intercepts of the graph of f(x) = 2 sin(3x) + rad3 on the interval [0, 2theta]?
 I'm still new and confused with sin graphs. I know the answer is 4pi/9, 5pi/9, 10pi/9, 11pi/9, 16pi/9, 17pi/9 but unsure of how the denominator got to be 9.   thank you!
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02/26/15

If f(x)= 3sin(x) + 4(x)^x
If f(x)=3sin(x) + 4(x)^x, find f'(3)
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Sine Trig

02/04/15

Which function has a domain of all real numbers?
Which function has a domain of all real numbers?   A). y=sinx B) y=secx C) y=cotx D)=tanx   I think it is A, sine.  Correct?
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Sine Cosine

01/30/15

How high will the rider be at 15 seconds after getting on?
A Ferris wheel has a center 55 feet above the ground, and a radius of 48 feet. If it takes 50 seconds for one revolution, give the equation that represents the wheel and sketch a graph. 
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01/16/15

trig/angles/
If sin(theta) < 0 and tan(theta) > 0 then: Answer choices:  90degrees < theta... more
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01/13/15

Please helpp, math unit test tomorrow!!!!
A commercial plane and a jet airliner are 7.5km from each other, at the same altitude. From an observation tower, the two aircraft are separated by an angle of 680. If the jetliner is 5.2km from... more
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01/04/15

solve the equation on the interval 0 = ? 2p
2sin2θ=sinθ
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Sine

12/17/14

solve the equation
Sinx / (1-cosx) - 1/sinx = 1/tanx   to  0< x <180 and 0< x < 360 
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Sine

11/01/14

find the sine of the angle
formed by two rays that start at the origin of the Cartesian plane if one ray passes through the point (3sqr3,3) and the other ray passes through the point (-4,4sqr3).   how do i get an answer of 1? more
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