Find the ratio of the two legs of the 60-30-90 triangle in the diagram above. (When you’re finding the ratio, use the vertical leg as the numerator and the horizontal leg as the denominator.)[br]This ratio should hopefully look familiar, as you’re looking at the change in y over the change in x. We used to call this the slope, but with Trigonometric ratios, we’ll be calling this the Tangent of [math]60^{\circ}[/math].

Find the ratio of the horizontal leg over the hypotenuse in the 60-30-90 triangle above. This ratio is referred to as the Cosine of [math]60^{^\circ}[/math], written as [math]cos\left(60^{^\circ}\right)[/math].

Find the ratio of the vertical leg over the hypotenuse in the 60-30-90 triangle above. This ratio is referred to as the Sine of [math]60^{^\circ}[/math], written as [math]sin\left(60^{^\circ}\right)[/math].