Question

tan[1/2cosinverse(√5/3)]​

Answer 1

Step-by-step explanation:

1(3−5)

Given,

y=tan[21cos−1(35)]

Let, x=cos−1(35)

⇒cosx=35

∴y=tan21x

y=tan2x

y=1+cosx1−cosx

=1+351−35

=3+