Question

Solve q. No 18 in the attachment.

Answer 1

Answer:

see the attachment for the solution..

Answer 2

Answer:

sin 4x

= sin(2 * 2x )

=2sin 2x cosec 2x

=2*2 sin x cosec x ( cos ^2 x - sin^2 x)

= 4sinx  cos^3 x -4 sin ^3 x cos x =RHS

LHS= RHS

HENCE PROVED

MARK IT AS THE BRAINLIEST

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