Asked by eve
how do you solve this?
cosx - cos(2x) =
cosx - cos(2x) =
Answers
Answered by
MathMate
use the identity
cos(2x)=cos²(x)-sin²(x)
if it is an equation, we will need something on the right hand side.
cos(2x)=cos²(x)-sin²(x)
if it is an equation, we will need something on the right hand side.
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