Topic 7 Trigonometric Functions

Sine and Cosine are defined as:

Sine is the opposite side divided by the hypotenuse in a right triangle.

Cosine is the adjacent side divided by the hypotenuse in a right triangle.

Given $\cos\phi=\frac{8}{10},\ find\ \cot\ and\ \csc\ \phi.$  

Remember,  $a=6,\ b=8,\ and\ c=10$ 
 $\cos\phi=\frac{8}{10},\ so\ \sin\phi=\frac{6}{10},\ and\ \tan\phi=\frac{6}{8}$    $\cot\phi=\frac{8}{6}$  

 Rodrigo was asked to identify the phase shift for the graph: