Trig Ratios Review

Front

What is the definition of the opposite side in a right triangle?

Back

The side opposite the angle in question.

Front

What is the definition of the adjacent side in a right triangle?

Back

The side next to the angle in question, but not the hypotenuse.

Front

What is the definition of the hypotenuse in a right triangle?

Back

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

Front

What is the sine function?

Back

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

Front

What is the cosine function?

Back

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

Front

What is the tangent function?

Back

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

Front

How do you find the measure of an angle using the sine function?

Back

Use the inverse sine function (sin⁻¹) on the ratio of the opposite side to the hypotenuse.

Front

How do you find the measure of an angle using the cosine function?

Back

Use the inverse cosine function (cos⁻¹) on the ratio of the adjacent side to the hypotenuse.

Front

How do you find the measure of an angle using the tangent function?

Back

Use the inverse tangent function (tan⁻¹) on the ratio of the opposite side to the adjacent side.

Front

If you know two sides of a right triangle, which trig function do you use to find an angle?

Back

Use tangent if you know the two sides that are not the hypotenuse.