计算：三角函数!（sin19°+cos199°/sin341°-cos161°）+（tan18°+cos34°tan162°-cos198°）
问题描述：
计算：三角函数!（sin19°+cos199°/sin341°-cos161°）+（tan18°+cos34°tan162°-cos198°）
（sin19°+cos199°/sin341°-cos161°）+（tan18°+cos34°/tan162°-cos198°）
题目有错
正确应为：(sin19°+cos199° )/(sin341°-cos161°)+( tan18°+cos342°)/( tan162°+cos198°)
答
题中有误(sin19°+cos199° )/(sin341°-cos161°)+( tan18°+cos342°)/( tan162°+cos198°)=(sin19°+cos199° )/(sin(360-19°)-cos(360-199°))+( tan18°+cos(360-18°)/( tan(180-18°)+cos(180+18°)=(sin19...