Question

If cos2'a' =sin4'a' where 2'a' and 4'a' are acute angles, then find the value of 'a'​

Answer 1

Step-by-step explanation:

cos2A=sin4A

sin (90°-2A)=sin4A

90°-2A=4A

90°=6A

90°÷6=A

A=15°

Answer 2

Answer:

please see the attached file