Trig Ratios: Finding Missing Angles

Front

What are the three primary trigonometric ratios?

Back

Sine (sin), Cosine (cos), Tangent (tan)

Front

What is the sine ratio in a right triangle?

Back

The sine of an angle is the ratio of the length of the opposite side to the length of the hypotenuse.

Front

What is the cosine ratio in a right triangle?

Back

The cosine of an angle is the ratio of the length of the adjacent side to the length of the hypotenuse.

Front

What is the tangent ratio in a right triangle?

Back

The tangent of an angle 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 ratio?

Back

Use the inverse sine function: angle = sin^-1(opposite/hypotenuse).

Front

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

Back

Use the inverse cosine function: angle = cos^-1(adjacent/hypotenuse).

Front

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

Back

Use the inverse tangent function: angle = tan^-1(opposite/adjacent).

Front

What is the range of the sine function?

Back

The range of the sine function is [-1, 1].

Front

What is the range of the cosine function?

Back

The range of the cosine function is [-1, 1].

Front

What is the range of the tangent function?

Back

The range of the tangent function is all real numbers.