Question

If Sin2A = 2 SinA, then A =?
O 0°
O 30°
O 45°
O 60°​

Answer 1

If Sin2A = 2 SinA, then A = 0°

sin2A=2sinA

=>2sinA.cosA-2sinA =0

=>2sinA(cosA-1)=0

=>either 2sinA=0

=>sinA=0

=>sinA=sin0°

=>A= 0°

=>or cosA -1=0

=>cosA=1

=>cosA=cos 0°

A=0°

☆ Hope its helpful ☆

Answer 2

Answer:

sin2A=2 sin A

sin 2 x 0=2sinx0

0=0(a)