化简：sin(x-2派）cos(x+派）tan(x-99派）/cos(派-x)sin(3派-x)sin(-x-派）
问题描述：
化简：sin(x-2派）cos(x+派）tan(x-99派）/cos(派-x)sin(3派-x)sin(-x-派）
答
sin(x-2π）cos(x+π）tan(x-99π）/cos(π-x)sin(3π-x)sin(-x-π）=sin(-2π+x）cos(π+x）tan(-99π+x）/(-cosx)sin(π-x)[-sin(x+π）]=sinx(-cosx)tan(-π+x）/(-cosx)sinx[-sin(π+x）]=sinx(-cosx)[-tan(π-x...