[tex]\bf \begin{array}{rllll}
(3.2&,&6.2)\\
x&&y
\end{array}\\\\
-------------------------------\\\\
sin(\theta)=\cfrac{y}{r}
\qquad
% cosine
cos(\theta)=\cfrac{x}{r}
\qquad
% tangent
tan(\theta)=\cfrac{y}{x}\\\\
-------------------------------\\\\
tan(\theta)=\cfrac{y}{x}\implies tan^{-1}[tan(\theta )]=tan^{-1}\left( \frac{y}{x} \right)
\\\\\\
\theta =tan^{-1}\left( \frac{y}{x} \right)\implies \measuredangle \theta =tan^{-1}\left( \frac{6.2}{3.2} \right)[/tex]
make sure your calculator is in Degree mode
