### Home > PC3 > Chapter Ch8 > Lesson 8.3.1 > Problem8-89

8-89.

Rewrite each of the following expressions in terms of $x$, where $x$ is any real number. Use the unit circle to justify your answers.

1. $\sin(\pi+x)=\underline{\ \ \ \ \ \ \ }$

1. $\cos(π + x) =\underline{\ \ \ \ \ \ \ }$

1. $\tan(π + x) =\underline{\ \ \ \ \ \ \ }$

tangent $=$ slope

1. $\sin(2π – x) =\underline{\ \ \ \ \ \ \ }$

1. $\cos(2π – x) =\underline{\ \ \ \ \ \ \ }$

1. $\tan(2π – x) =\underline{\ \ \ \ \ \ \ }$

tangent $=$ slope