(cosπ/8+sinπ/8)（cos^3π/8-sin^3π/8）.

(cosπ/8+sinπ/8)（cos^3π/8-sin^3π/8） (cos π/8+ sin π/8 ) (cos^3 π/8+sin^3 π/8 )的值. 【1】化简：sin(a-5π）/cos(3π-a）×cos(π/2-a）/sin(a-3π）×cos(8π-a）/sin 化简sin(α-5π)/cos(3π-α)×cos(π/2-α)/sin(α-3π)×cos(8π-α)/sin(-α- 求SINπ/64 COSπ/64 COSπ/32 COSπ/16 COSπ/8 8sin(π/32)cos(π/32)cos(π/16)cos(π/8),求值 已知向量m=(cosθ,-sinθ),n=(根号2+sinθ,cosθ),θ∈(π,3π/2),且cos(θ/2+π/8 sin(θ-5π)cos[(-π/2)-θ]cos(8π-θ)}/sin[θ-(3π/2)]sin(-θ-4π) 计算：cos（π/8）*sin（π/8）=? 计算 sin5π/8*cos（7/8）π+sinπ/8-cos（3/8）π 求SINπ/64 COSπ/64 COSπ/32 COSπ/16 COSπ/8!急救急救 cos sin π √