121 Answered Questions for the topic Sine

06/28/18

Help simplifying?
simplify.   2sin2x/2 -1
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06/28/18

Find the exact value of sin 2θ​, cos 2θ, and tan 2θ and the quadrant in which 2θ lies. Cos θ=-20/29, θ is in quadrant III?
Thank you!
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06/27/18

Given the function value and the quadrant restirction, find θ?
Sin θ=-0.9744   (270°, 360°)
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06/06/18

Prove this identity:
prove the following identity: 2sin^2(x)/sin2(x)+cot(x)=sec(x)csc(x)   please note that the cot(x) is not with the sin2(x) as a part of the denominator. The 2sin^2(x)/sin2(x) is its own fraction.... more
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06/06/18

Prove the following identity:
prove the following identity:   2sin^2(x)/sin2(x)+cot(x)=sec(x)csc(x)
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Sine

04/19/18

Sine & Cosines - heading & distance
You are at point A , to the west side of a tall mountain.  You are planning a hike around the mountain to point C, which is 9 miles east of A.  You start by hiking a distance of 6.6 miles on a... more
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03/02/18

See Description
One end of a wire is attached to the top of the tower and the other end to a stake in the ground that is 44’ from the base of the tower. The wire makes a 64 degree angle with the flat ground. If... more
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01/18/18

What is csc2x if tanx = -3/4 and pi/2 < x < pi
The first "<" is a one with a line under it.
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12/04/17

Why do the values of sin and cos follow such a pattern:
sin(0)=(√0)/2 sin(π/6)=(√1)/2 sin(π/4)=(√2)/2 sin(π/3)=(√3)/2 sin(π/2)=(√4)/2   cos(0)=(√4)/2cos(π/6)=(√3)/2cos(π/4)=(√2)/2cos(π/3)=(√1)/2cos(π/2)=(√0)/2   Why do they follow this pattern?... more
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11/29/17

sin(tan^-1 v - tan ^-1 u)
exact answer i believe
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10/27/17

what is the significance between cos(45) being equal to sqrt(0.5)
I was messing with a calculator and found that the square root of 0.5 is equal to the sine and cosine of 45. I was just wondering the correlation between the two equations.
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10/08/17

horizontal and vertical asymptotes of y=x/sinx
find all horizontal and vertical asymptotes of  y=x/sinx   vertical asymptotes: if i set denominator to 0, then sinx=0 and x= 0 or npi?    horizontal asymptotes: i have to find the limit of... more
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10/04/17

Find the values of the trigonometric functions of t
csc t = 3 and the terminal point of t is in Quadrant II.
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08/24/17

Interference of Light help?
Light passing through a double slit with separation d=3.33*10^-5 created its first minimum (m=1) at an angle of .551 deg. What is the wavelength of the light in nanometers?   I thought I was... more
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08/07/17

If sin(x) = 1/8 and x is in quadrant I, find the exact values of the expressions without solving for x.
If sin(x) = 1/8 and x is in quadrant I, find the exact values of the expressions without solving for x.   a) sin(2x) b) cos(2x) c) tan(2x)
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07/31/17

Sine and Cosine Problem
Hello, I am having trouble with the following problem: If A and B are both acute angles and sin(A)=6/13 and cos(B)=48/49 find the value of cos9-A)-sin(-B).  Write the answer as a simplified... more
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07/23/17

Explain how you could translate the graph of y = sin(x) to obtain y = cos(x).
If the graph of y = sin(x) is shifted __?____ units left, the graph of y = cos(x) is obtained.
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07/19/17

Trigonometry Proof
Please help me answer the following question! I'm stuck!   Prove that cos6ß + sin6ß = 1/4 + 3/4cos2ß   I've tried simplifying out the LHS into (cos2ß)3 + (sin2ß)3, but I don't know what to do... more
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04/10/17

if P(s) lies in the second quadrant, then (cos s) (tan s ) > 0
trigonometry
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03/27/17

Trig problem
Evaluate sin(sin-1(sin60)) [60 degrees]   and    evaluate cos-1(cos(cos-10.5)) if the angle is in quadrant 1. 
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02/27/17

sinusoidal function question?
i really don't understand this question can someone help me 3. A scientist recorded the movement of a pendulum for 10 s. The scientist began recording when the pendulum was at its resting... more
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02/27/17

Solve the equation on the interval [0,360) 2sin^2(x)+3sin(x)+1=0
As well as this one below. I'm just having trouble understanding the process and steps.     Find all the solutions in [0,2pi) sin^2(t)-cos^2(t)=0 3. Solve the equation on the interval [0,360)  ... more
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02/20/17

Solve the equation: 2 sin(3θ)- √3=0, 0 ≤ θ< 2π.
Solve the equation 2 sin(3θ)- √3=0, 0 ≤ θ< 2π
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02/13/17

Angle θ is an angle in standard position and B(-3,4) is a point on the terminal side of the angle. Find the value of sin(θ).
Angle θ is an angle in standard position and B(-3,4) is a point on the terminal side of the angle. Find the value of sin(θ).
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02/12/17

Describe a real-world phenomenon that can be modeled by one of these two trigonometric functions.
The sine and cosine functions are used to model periodic behavior. find an internet resource that discusses the periodic behavior.
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