Question

Find cos 0, where 0 is the angle shown.

Give an exact value, not a decimal approximation.

Answer 1

Explanation:

For RIGHT triangles, cos = adjacent leg/hypotenuse

cos Φ = 7 / hypotenuse

Use Pythagorean Theorem to find hypotenuse

hyp^2 = 7^2 + 24^2

hyp = 25

cos Φ = 7/25 or 0.28