Trigonometry / Sum of two angles (α + β) if sinα = 8/17 and sinβ = 15/17 Find the sum of two angles α and β if sinα = 8/17 and sinβ = 15/17 if they are
A) acute
B) obtuse
How do you approach this problem? I'm stuck at the beginning. Please help.

In any problem like this where you are given the $\sin$ of an angle as a fraction, there is usually some involvement of Pythagoras' Theorem.
Imagine a right-angled triangle with opposite side length 8 and hypotenuse length 17. It will have the angle $\alpha$ with $\sin \alpha = \frac 8 {17}$. Find the other side...
