5. Trigonometric Functions

Identify the reference angle of each given angle.

$120°$

Identify the reference angle of each given angle.

$210°$

Identify the reference angle of each given angle.

$\frac{7\pi }{4}$ rad

Identify what angle, $\theta$ , satisfies the following conditions.

$\(\cos\)\(\theta\)=\(\frac{\sqrt3}{2}\)$; $\(\sin\)\(\theta\)$ < $0$

For each expression, identify which coterminal angle to use & determine the exact value of the expression.

$\cos (-\frac{10\pi }{4})$

Identify what angle, $\theta$, satisfies the following conditions.

$\(\tan\)\(\theta\)=-1$; $\(\cos\)\(\theta\)$ > $0$

For each expression, identify which coterminal angle to use & determine the exact value of the expression.

$\tan 765°$

Identify what angle, $\theta$ , satisfies the following conditions.

$\(\sin\)\(\theta\)=\(\frac\)12$; $\(\tan\)\(\theta\)$ < $0$.

For each expression, identify which coterminal angle to use & determine the exact value of the expression.

$\sin \frac{7\pi }{3}$