Can the opposite in a trig ratio also be a hypotenuse?
In the problem where there is a triangle ABC and with AB being 12, BC being 9, and AC being 15, we are asked to find the angle measure of A.
I know that you can prove it with the Pythagorean theorem because 144+81=225, but I tried using the trig ratio
sin-1 = 15/15 which gets you 90...
I've only tried this with this case, but does this apply to all problems?
Thanks