7) cos 40 degrees = x/11 or approx. 8.4
8) sin 44 degrees = x/6 or approx. 4.2
9) cos 73 degrees = x/4 or approx. 1.2
Cosine is used for the adjacent leg/hypotenuse. Sine is used for the opposite leg/hypotenuse. If you need to find x, then set up the ratios and solve.
