SinA=8/17, so arcsin(8/17) is your angle of A (around 49 degrees). 90-A is your angle for B

Since the denominator is a monomial, we divide each term of the trinomial in the numerator by the denominator.

, because 3/-3 = 1 and x³/x = x².

; 9/-3 = -3 and x²/x = x.

; -6/-3 = 2 and x/x = 1, so we have 2*1 = 2.
Together this gives us
N=9

n=9.333333333333333

that is 15 3's by the way.
it would be true because 7*7 would be 49