We have a right triangle with sides AB, BC=5cm and AC=13cm (the hypotenuse). Let's apply the Pithagorean Theorem to find AB:
(1)
(2)
(3)
(4)
Now that we know the value of each side of the triangle, we will use the trigonometric function sine to find the angles C and A (angle B is remembering we are talking about a right triangle):
After all ice caps have melted and the polar bears drown, and the coastal cities are all underwater, Al Gore will ride a spacecraft to the Moon or Mars and inhabit there and tell everyone I told you so...