## Why do we use cos theta in physics?

The Cos Theta Formula is especially useful when working with right-angled triangles. In a right triangle, the Cosine of an angle will always be the length of the adjacent side divided by the length of the hypotenuse. Why do we use sin and cos in physics? Sine and cosine — a.k.a., sin(θ) and cos(θ) — … Read more