Finding Missing Angles Using Trig Ratios

Front

What is the sine ratio in a right triangle?

Back

The sine ratio (sin) is defined as 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 ratio (cos) is defined as 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 ratio (tan) is defined as the ratio of the length of the opposite side to the length of the adjacent side.

Front

How do you find the missing angle using sine?

Back

To find the missing angle using sine, use the formula: angle = sin^-1(opposite/hypotenuse).

Front

How do you find the missing angle using cosine?

Back

To find the missing angle using cosine, use the formula: angle = cos^-1(adjacent/hypotenuse).

Front

How do you find the missing angle using tangent?

Back

To find the missing angle using tangent, use the formula: angle = tan^-1(opposite/adjacent).

Front

What is the range of the sine function?

Back

The range of the sine function is from -1 to 1.

Front

What is the range of the cosine function?

Back

The range of the cosine function is from -1 to 1.

Front

What is the range of the tangent function?

Back

The range of the tangent function is all real numbers.

Front

If sin(θ) = 0.5, what is θ?

Back

θ = 30° or θ = 150° (in degrees).