Question

cos(π/32)*cos(π/16)*cos(π/8)=

Answer 1

Cos[Pi/32] Cos[Pi/16] Cos[Pi/8] = 1/(Sec[Pi/8] Sec[Pi/16] Sec[Pi/32]) = -((-1)^(25/32) (1 + (-1)^(1/16)) (1 + (-1)^(1/8)) (1 + (-1)^(1/4)))/8