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 +...

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 +...

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

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

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...

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...

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

Explain why sin⊗2 + cos⊗2=1

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

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

Give an explanation.

Your friends have opened an ocean fishing operation that requires their fishing vessel to cross a channel, where the depth of the water (in metres) varies with time, and is represented by the following...

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

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...

One end of a 9.3 foot pole is 13.6 feet from an observer's eyes, and the other end is 17.4 feet from the observer's eyes. Through what angle does the observer see the pole?

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

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

Prove: SQUARE ROOT OF (3cosx+4sinx)2+(4cosx-3sinx)2 = 5 Please include step by step and the identities used next to each step! :)

Prove: sinx/sinx+cosx)=tanx/1+tanx If you could, please list the steps and include the identities next to the steps.

Prove: (secx+tanx)^3(secx-tanx)^4=1-sinx/cosx Please show the steps and prove this by making both sides equivalent to each other. Also, please include which identities follow...

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...