Question

find the magnitude of angle A if 4sinAsin2A + 1 -2sin A =2 sinA​

Answer 1

Answer:

Given,

sina+sin

2 a=1

⇒sina+1−cos

2 a=1

⇒sina=cos

2 a_1

⇒sin

2 a=cos 4a_2

Now,

cos 2 a+cos 4 a

=sina+sin

2a=1

mujhe aapse baat karne hai 12:40 par

Answer 2

Answer:

here is your answer bro

hope helpful from you