### Home > A2C > Chapter 8 > Lesson 8.2.4 > Problem8-162

8-162.

Find the exact value for each of the following trig expressions. For parts (g) and (h), assume that 0 ≤ θ ≤ 2π.

Refer to problem 8-121.

1. $\operatorname { cos } ( \frac { 3 \pi } { 4 } ) =$

$-\frac{\sqrt{2}}{2}$

1. $\operatorname { tan } ( \frac { 4 \pi } { 3 } ) =$

1. $\operatorname { sin } ( \frac { 11 \pi } { 6 } ) =$

$-\frac{1}{2}$

1. $\operatorname { sin } ( \frac { 3 \pi } { 4 } ) =$

1. $\operatorname { tan } ( \frac { 5 \pi } { 4 } ) =$

$1$

1. $\operatorname { tan } ( \frac { 17 \pi } { 6 } ) =$

1. $\operatorname{tan}\left(θ\right) = 1$

$\frac{\pi}{4}$

1. $\operatorname{tan}\left(θ\right) = −1$