Recall the angle sum identities:


Now,

Divide through numerator and denominator by
to get

Next, we use the fact that
lie in the first quadrant to determine that


So we then have


Finally,

Answer: quadratic model, 0.866
Step-by-step explanation:
172 = 1/2 * x + 45
172 = 1/2x + 45 / - 45 (both sides)
127 = 1/2x / * 2 (both sides)
x = 254
Answer: 0.18
Step-by-step explanation:
look it up i did on Desmos