The mnemonic SOH CAH TOA reminds you of the relationship between the sides of a right triangle and the trig functions of an angle. Here, we are given the side adjacent to the angle, and we want to find the side opposite. This suggests the Tangent relationship could be useful:
Tan = Opposite/Adjacent
tan(35°) = x/(12 cm)
(12 cm)·tan(35°) = x ≈ 8.4 cm . . . . . . multiply by 12 cm
