In this video I show you how to find the exact values of the following without using a calculator. You need to be familiar with the graphs of y=arcsin(x), y=arccos(x) and y=arctan(x) and also the quadrant diagram.

Find the value of:

In this video I extend the work covered so far with finding the values of general expressions

Find the value of:

In this video I show you how to prove that following. Have a go before looking at the video.

This may not be the only method. If you have others then let me know and we can share them.