There is a paint chip on the edge of a gear for a music box. It rotates to (-7, 3) during one song when represented graphically. What is the cosine value of this function?

The solution would be like this for this specific problem:

Cos θ = adjacent side / hypotenuse

c^2 = a^2 + b^2 c^2 = 3^2 + 7^2 c = sqrt (3^2 + 7^2) = ?

c^2 = a^2 + b^2 c^2 = 3^2 + 7^2 c = sqrt (3^2 + 7^2) = ?

cos θ = adjacent side/hypotenuse = - 7 / √ 58 = - 7√58 / 58