proof that (sinx+sin3x-2sin2x)/(sinx+sin3x+2sin2x)=-tan(x/2)

sin3x=(sinx)(3-asin^2x) Wow! is that arcsin^2(x) ??? are we solving for x? or is it proving...

when you have "y = 1/2sin2x". . . Does the equation have a vertical compression by a factor of 1/...

Prove: sin3x-sinx/cos3x-cosx=-cot2

2sin2x+1=0

secx/sinx-sinx/cosx=cotx

Sin(x+y)cos(x-y)= 1/2sin2x+ 1/2 sin2y Help please I have no idea how to do this because my math c...

Prove that: (sinx-2sin2x+sin3x)/(sinx+2sin2x+sin3x)= -tan^2 x/2.

sin3x−sinx=0

2sin2x = cos2x for - pi x pi

If sinx + sin²x + sin³x = 1, find cos⁶x - 4cos⁴x + 8cos²x

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