High School Math : Understanding Arcsine, Arccosine, and Arctangent

Example Questions

Example Question #1 : Arcsin, Arccos, Arctan

What is  if  and ?

Explanation:

In order to find  we need to utilize the given information in the problem.  We are given the opposite and adjacent sides.  We can then, by definition, find the  of  and its measure in degrees by utilizing the  function.

Now to find the measure of the angle using the  function.

If you calculated the angle's measure to be  then your calculator was set to radians and needs to be set on degrees.

Example Question #3 : Trigonometry

What is ?

Explanation:

To get rid of , we take the or of both sides.