Question

if cos 3a = sin45 then find tan 2a

Answer 1

the answer will cot2a

Answer 2

Hey... I think this can be ur answer!!

Cos 3a = sin 45
Cos 3a = cos (90-45)
Cos 3a = cos 45
3a=45
A = 15

Now,
Tan 2a = tan 2(15)
=tan 30 = 1/ root 3

Hope it helps you dear ☺️☺️