## Elementary Geometry for College Students (6th Edition)

Cosine ratio, $θ \approx 58^{\circ}$
1. Find the base of the triangle $= \frac{26-10}{2}$ $= \frac{16}{2}$ $= 8$ ft 2. Find the ratio and angle $cos = \frac{adjacent}{hypotenuse}$ $cos(θ) = \frac{8}{15}$ (Cosine ratio) by GDC / calculator $θ = 57.769...^{\circ}$ $θ \approx 58^{\circ}$