An Equation of the Terminal Side of an Angle in Standard

Multiple Choice

An equation of the terminal side of an angle in standard position is given along with a restriction on x. Find the
indicated trigonometric function value of . Do not use a calculator.
- $y = 3 x , x \geq 0 ; \quad$ Find $\tan \theta$

A) $\frac { 1 } { 3 }$
B) $\frac { \sqrt { 10 } } { 10 }$
C) $\frac { 3 \sqrt { 10 } } { 10 }$
D) 3