How to show that? A(x)=4cosx.cos2x.sin4x
For each x of R we put:
A(x): Sinx+Sin3x+Sin5x+Sin7x
For each x of R we put:
A(x): Sinx+Sin3x+Sin5x+Sin7x
1 Answer
Feb 10, 2018
Please see below.
Explanation:
We use here the identity relations -
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