## Algebra and Trigonometry 10th Edition

$\theta=\arctan (\dfrac{s}{750})$ or, $\theta=\tan^{-1} (\dfrac{s}{750})$
We will take the tangent of an angle. That is, $\tan \theta =\dfrac{s}{750}$ Now, take the inverse of the tangent of an angle. $\theta=\arctan (\dfrac{s}{750})$ or, $\theta=\tan^{-1} (\dfrac{s}{750})$ Plug in the data to obtain: $\theta=\arcsin (\dfrac{5}{40})=0.125$ and $\theta=\arcsin (\dfrac{5}{20})=0.253$