Intro to Trig Ratios

The cosine of angle P is defined as the ratio of the length of the adjacent side to the length of the hypotenuse in a right triangle. In this case, it is q/r.

The side that is next to angle A and is not the hypotenuse is called the adjacent side. In this case, it is side b.

You should use the tangent function, which is defined as the ratio of the opposite side to the adjacent side.

You should use the sine function, which is defined as the ratio of the opposite side to the hypotenuse.

You should use the cosine function, which is defined as the ratio of the adjacent side to the hypotenuse.

Sine is the ratio of the length of the opposite side to the length of the hypotenuse.

Cosine is the ratio of the length of the adjacent side to the length of the hypotenuse.

Tangent is the ratio of the length of the opposite side to the length of the adjacent side.

Tangent can be expressed as the ratio of sine to cosine: tan(θ) = sin(θ) / cos(θ).

The hypotenuse is the longest side of a right triangle, opposite the right angle.