Math, asked by nihasolkar, 7 months ago

2cos x - cos 3x - cos 5x=
16cos^3x.sin²x

Answers

Answered by pranjalkadam48

1

Step-by-step explanation:

RHS =2cosx−2cos4xcosx

=2cosx(1−cos4x)

=2cosx.2sin

2

2x

=4cosx(2sinxcosx)

2

=16cos

3

xsin

2

x

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