Question

Sin 2A =2 sin A x cos A is true when A = ?

Answer 1

Answer:

Step-by-step explanation:

given sin2A=2sinA

we know that sin2A=2sinAcosA

so, 2sinAcosA=2sinA

divide with 2sinA on both sides ,we get  

cosA=1

cosA=cos0

A=0