Question

cos 2b =3 sin square a true or false

Answer 1

Answer:

False.

Step-by-step explanation:

RTP:    $cos2b = 3sin^{2}a$

The given statement is not always true.So it is false.

For example , $cos 2b$ can be either -ve or +ve but $3sin^{2} a$ is always +ve.