Question

Cos^2 пи /8-sin^2пи /8

Answer 1

Cos²π/8-sin²π/8=cosπ/4=√2/2

Answer 2

Cos2*п/8=соsп/4= корень2/2

Answer 3

cos^2(pi/8) - sin^2(pi/8)

Using the Pythagorean identity, we can rewrite this expression as:

cos^2(pi/8) - (1 - cos^2(pi/