Please at least do part A and explain! I have no idea how to do it.

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

Solve the equation for x.3(6x - 1) = 12 i've tried doing the math and i can't find out what i'm doing wrong

Seymour is twice as old as cassandra. if 16 is added to cassandra’s age and 16 is subtracted from seymour’s age, their ages become equal. what are their present ages? show !