Sin(2\theta )sin(4\theta )cos(2\theta )cos(4\theta )=? complete identity

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asked Oct 16, 2018 177k views

4 votes

Sin(2\theta )sin(4\theta )cos(2\theta )cos(4\theta )=? complete identity

Mathematics
high-school

Sahil Hariyani asked

by Sahil Hariyani

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1 Answer

3 votes

group as
sin(2T)Cos(2T)Sin(4T)Cos(4T)
Using the identity 2Sin(x)Cos(x) = Sin(2x),
=(1/4)Sin(4T)Sin(8T)
where T is theta.
I don't think there is a more simple reduction.

Chopin answered Oct 22, 2018

by Chopin

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