Answer:
that formula is known as the Pythagorean theorem
Explanation:
The sine is the ratio of the opposite side to the hypotenuse. When the ange is acute (< 90°), the hypotenuse is longer than the opposite side of the right triangle, so the ratio of that side length to the hypotenuse must be less than 1.
If I’m doing it correctly it’s 2/3 but I haven’t done it in a while