Does the pthagorean therum work with iscoscoles triangle?

In triangle opq right angled at p op=7cm,oq-pq=1 determine the values of sinq and cosq

Just tell me how to set up the equation.

Segment an is an altitude of right δabc with a right angle at a. if ab = 2, squared 5 in and nc = 1 in, find bn, an, ac.