Angles ∝ and β are the two acute angles in a right triangle. use the relationship between sine and cosine to find the value of β if β < ∝.
sin(2x + 2) = cos(3x + 8)

Problem number 26 of the rhind papyrus says: find a quantity such that when it is added to of itself the result is a 15. the modern day equation that models this problem is x + x = 15. what is the solution to the equation? x = 10 x = 12 x = 15 x = 30