Suppose $\displaystyle \sin{ \theta } = \frac{x}{7}$ and the angle $\theta$ is in the first quadrant. Write algebraic expressions for $\cos( \theta )$ and $\tan( \theta )$ in terms of $x$.

(a) $\cos( \theta )$ = help (formulas)

(b) $\tan( \theta )$ = help (formulas)