Question

Cos^2(180/8-A/2)-sin^(180/8+A/2)​

Answer 1

Answer:

please send pic of your question i am not understanding it clearly

Answer 2

Answer:

cos ^2(π/8)  + cos^2 (3π /8) + cos ^2 ( 5 π/ 8 ) cos^ 2 ( 7 π/8 ) = 2