cos(5w) + cos(w) cot(2w)
----------------- = ----------
cos(w) - cos(5w) tan(3w)
and
cos^2(1/2x) - sin^2 (1/2x) = cosx
Lol alright.
For the 1st one. I just used a sum product identity on the left side of the equation, but came up with just cot(2w) * cot(3w). Am I missing something?
and for the 2nd one, I don't know what identity to use lol
You're very close.For the 1st one. I just used a sum product identity on the left side of the equation, but came up with just cot(2w) * cot(3w). Am I missing something?
. Remember that tangent and cotangent are reciprocals?
Try the cosine of a double angle formula.and for the 2nd one, I don't know what identity to use lol
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