the terminal side of 0 passes through the point (8,-7) what is the exact value of cos 0 in simplified form​

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Work Shown:

x^2+y^2 = r^2

(8)^2+(-7)^2 = r^2

113 = r^2

r = sqrt(113)

The distance from (0,0) to (8,-7) is exactly sqrt(113) units.

This is the exact length of the hypotenuse of the right triangle.

Next, we do the following steps:

Side note: cosine is positive in quadrant Q4.