Question

if sin 2A = 2sin A, then A =​

Answer 1

Answer:

Given,

sin 2A = 2sinA ........(i)

Now, we know that always

sin2A = 2sinAcosA [It is a formula]

=> 2sinA = 2sinAcosA [ substituting from (i)]

=> 1 = cosA

=> cosA = 1

=> cosA = cos0°

=> A = 0°

Hope this helps you.