Question

求17题解题过程和答案，谢谢！

求17题解题过程和答案，谢谢！解题过程和答案最好写在一张纸上，写清楚点，拍下来

Answer 1

解答如图

Answer 2

诱导公式：tan(2π-θ)=-tanθ
sin(-2π-θ)=sin[-(2π+θ)]=-sin(2π+θ)=-sinθ
cos(6π-θ)=cos[4π+(2π-θ)]=cos(2π-θ)=cosθ
cos(θ-3π)=cos[-(3π-θ)]=cos(3π-θ)
=cos(2π+π-θ)=cos(π-θ)=-cosθ
sin(5π+θ)=sin(4π+π+θ)=sin(π+θ)=-sinθ