sin（x+π）=-sin（x）=-0.5sin（x）=0.5sin（5π-x）-cos（x-3π/2)sin（π-x）-cos（x-π）=sin（x）-cos(x+π/2)=sin(x)+sin(x)=1sin(π/2+x)*tan(π/2+x)=cos(x)*cos(x)/-sin(x)=(1-sin(x)2)/-sin(x)=-1.5...