Cosine (x) = 4 over 5 cos ( x ) = 4 5 Explanation: First you must apply sohcahtoa it means sine = opposite side over hypotenuse sine = opposite/hypotenuse cosine = adjacent side over hypotenuse cosine = adjacent/hypotenuse tangent = opposite side over adjacent side tangent = opposite/adjacent then solve the unknown by applying the Right Triangle Theorem. draw a right triangle. label the parts where a is the opposite side b is the adjacent side c is the hypotenuse Solve the unknown. The hypotenuse using a 2 + b 2 = c 2
since the given tan x = 3 4
it means tan = opposite/adjacent a = opposite side = 3