Answer:
see below
Step-by-step explanation:
Since this is a right triangle, we can use trig functions
sin alpha = opp side/ hyp
sin alpha = 12/ 15
Take the inverse sin of each side
sin^-1 sin alpha = sin^-1 (12/15)
alpha = 53.13010235
sin beta = opp side/ hyp
sin beta = 9 /15
Take the inverse sin of each side
sin^-1 sin beta = sin^-1 (9/15)
beta = 36.86989765
