Home > A2C > Chapter 12 > Lesson 12.2.1 > Problem12-100

12-100.

Find the exact value for each of the following trig expressions:

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

Use the unit circle.

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

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

See part (a).

−1

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

See part (a).