38 Answered Questions for the topic Sin


Prove the following is an identity...

Prove that  is an identity. Pleae keep formatting and answer neat and concise thank you!


Complete the following quadratic equation...a) state the other five trigonometric ratios as fractions.

Given a) state the other five trigonometric ratios as fractions.b) determine the value of  to the nearest degree.


Angle theta lies in quadrant 2. Without using a calculator, determine if the following ratios are true or false. Explain your reasoning.

Angle  lies in quadrant 2. Without using a calculator, determine if the following ratios are true or false.  Explain your reasoning.a) b) 


If cos α = 0.923 and cos β = 0.624 with both angles’ terminal rays in Quadrant-I, find the values of (a) cos ( α + β ) = (b) cos ( β − α ) =

I need to find it the the 4th decimal any help would be appreciated?


Quadrant type of problem

In a quadrant there are four sides sooo


Verify the conclusion of​ Green's Theorem by evaluating both sides of the equations for the field

Verify the conclusion of​ Green's Theorem by evaluating both sides of the equations for the field F = - 3yi + 3xjTake the domains of integration in each case to be the disk R: x2 + y2 ≤ a2 and its... more


Which expressions are equivalent to −tan⁡ θ?

1) Which expressions are equivalent to −tan⁡ θ?There may be more than one correct answer. Select all that apply.a) 1/cot(−θ)b) 1/cotθc) tan θd) −1/cotθe) −1/cot(−θ)f) tan(−θ)2) What is the correct... more


If cos x=8/17, and 3π2<x<2π, what is sin(x−π)?

If Tan^2(t)-Sin^2(t)=Sin^a(t)/Cos^b(t), then the positive power a= ALSO the positive power b=

So, I know the first two stepssin^2(t)/cos^2(t) -sin^2(t)sin^2(t)-sin^2(t)cos^2(t)/(cos^2(t)I have no idea what to do after this? I looked and it said to factor but I have no idea why you factor... more


What is the difference between إِثْم and ذَنب and سَيِّئَة which refer to sin?

There are a number of Arabic words in Quran that refer to sin like: إِثْم and ذَنب and سَيِّئَة. *I am looking for the difference between them and their usage.*


Find all angles θ between 0° and 180° satisfying the given equation sin(θ) = 1/8

This is a trig question my math teacher gave and i am confused. I thought the answers were 4.2 and 172.8
Sin Math


Establish the identity sin ( π/2 + Ø) = cos Ø

Which of the following four statements establishes the identity?   A.) sin ( π/2 + Ø) = sin π/2 sin Ø+cos π/2 cos Ø=(0)sinØ+(1)cosØ=cosØ B.) sin ( π/2 + Ø) = sin π/2 sin Ø-cos π/2... more
Sin Angle


Find the missing angle

Find the missing angle below for 0°≤Ø≤90°   sinØ=√2/2


Sin and Cos functions

Without a calculator, find the exact value of:   a) sin(120)   b) cos(-3Π/4)



Find all solutions of the equation in the interval [0,2pi).   (sinx)^2=2-2cosx   Write your answer in radians in terms of pi
Sin Tan Cot


Find cot(x) and sin(x), if cos(x)=-(1/5) and tan(x)<0

I really need a lot of help in math, it's my worst subject. My best is English, but that's not important.


Find sin(x) and cos(x), if cot(x)=8 and csc(x)<0

I have a few more questions about stuff like this, but all my questions are going on here separately. I think I'm STARTING to understand this stuff a little better. I just can't figure out how to... more

Graphing Trig. Functions & Inverses

Evaluate In degrees:   1. Sin^-1 (-2pi)    2. arctan (- square root 3/3)   3. sin (cos^-1(- square root 3/2)      Evaluate in Radians   1. Arctan (-1)   2. cos^-1 (- 1/2) 


Solving For X In The Interval

Solve for x in the interval...   0<x<2π: 3sin2(2x+1)+2sin(2x+1)-1=0   My teacher says there should be 6 answers.  I have a TI-84 calculator, so maybe there's a way to plug this in to find... more


Solve For All Values of X

Solve for ALL values of x in the real number system.  If an EXACT solution does not exist, round your answers to the nearest hundredth.   sin2x = sinx


Find the tension in each cable necessary to keep the block from moving (either sideways or downward)

A 900-lb block is being suspended and held stationary by two steel cables as shown.  The first cable (to the left of the block) makes a 70 degree angle with the horizontal, while the second cable... more


Convert from Polar to Rectangular Form

Convert the following from Polar to Rectangular Form:   r=3sinΘ(Theta)-4cosΘ(Theta)


Evalulate Basic Problems

My professor said for this problem to use inverse trig functions, half angle, and double angle identities.   Evaluate:   tan(2sin-1(4/5))   Please list the answer step by step and next to... more


Prove Basic Problems (Dealing with Cos & Tan)

Prove:   1-cos2x/1+cos2x=tan2x   Please include step by step and next to each step, please include the identity used! :)

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