Question

Sin 2A= 2Sin A is true when=

1. 0 degree 2. 30 degree 3. 45 Degree 4. 60 Degreee

If zero how?????????????

Answer 1

answer is 0
sin2A = 2 sinA

In 2sinA
If A=O
=2sin0°
=2×O
=O

In sin 2A
=sin2×0°
sin0°
=sin0°
=0

Answer 2

bcoz cos0°=1


& there. are formula 2 sin a cos a

so the option is 1 true