设f(α)=2sinacosatana/1+sin²a+cos(3π/2+a)-sin²(π/2+a)(1+sin2a≠0)(1)化简f(a) (2)求f(1°)f(2°)...f(89°)
问题描述:
设f(α)=2sinacosatana/1+sin²a+cos(3π/2+a)-sin²(π/2+a)(1+sin2a≠0
)(1)化简f(a) (2)求f(1°)f(2°)...f(89°)
答