Question

(iii)if sin A =30
sin 2A = 2 sin A cos A​

Answer 1

Step-by-step explanation:

sin 2A = 2 sin A cos A

sin 2A = 2 sin A cos A√3/2= 1×√3/2{sin 2A=√3/2 ; cos A=√3/2}

sin 2A = 2 sin A cos A√3/2= 1×√3/2{sin 2A=√3/2 ; cos A=√3/2}√3/2=√3/2{hence proved!!}