As you can see, this type of problem requires a diagram of a carefully labeled right triangle. The measures of the magnitudes of any given vectors and their components as well as any known angles should be labeled. Trigonometric ratios often help us set up an equation
which can then be solved for the requested missing information.. If the two legs of the triangle
are a part of the problem, it is a tangent ratio. If the hypotenuse
is part of the problem, it is either a sine or cosine ratio.