Intro to Trig Ratios

Front

What is the cosine of angle P?

Back

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.

Front

What is adjacent to angle A in a right triangle?

Back

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.

Front

Which trig function should you use if you are given the two sides that are not the hypotenuse?

Back

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

Front

Which trig function should you use if you are given the opposite side and hypotenuse?

Back

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

Front

Which trig function should you use if you are given the hypotenuse and an adjacent side?

Back

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

Front

Define sine in the context of a right triangle.

Back

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

Front

Define cosine in the context of a right triangle.

Back

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

Front

Define tangent in the context of a right triangle.

Back

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

Front

What is the relationship between sine, cosine, and tangent?

Back

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

Front

What is the hypotenuse in a right triangle?

Back

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