Question

$\sin( 2a)$

Answer 1

sin 2A = 2 sin A cos A

Answer 2

Hi friends..
We have to find sin2a = ?Solution:-
Sin2a= sin(a+a)
= Sin(a)×cos(a) + cos(a)×sin(a)
= 2sin(a)×cos(a)
Formula used:- Sin(a+b)=sin(a)cos(b) +
cos (a)sin(b)

Hence...
Sin2a =2sin(a) cos(a)

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