Correct option is C
Given:
sin2A=2sinA
Formula used:
The double-angle identity:
sin2A = 2sinAcosA
Solution:
Substitute the formula for sin2A into the equation:
2sinAcosA = 2sinA
Divide both sides by 2sinA (assuming sinA):
cosA = 1
cosA = cos
Since Cos A = 1
A=
The value of A is