(a+sinQ)(b+cosQ) 能化简米?
问题描述:
(a+sinQ)(b+cosQ) 能化简米?
答
(a+sinQ)(b+cosQ)
=ab+acosQ+bsinQ+sinQcosQ
=ab+acosQ+bsinQ+1/2sin2Q
答
(a+sinQ)(b+cosQ)
=ab+acosQ+bsinQ+sinQcosQ