Unit 4 Trig Review

Front

What is the definition of tangent (tan) in a right triangle?

Back

Tangent (tan) 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 tangent function?

Back

To find the measure of an angle using tangent, use the formula: angle = arctan(opposite/adjacent).

Front

What is the value of tanZ if the opposite side is 7 and the adjacent side is 24?

Back

tanZ = 7/24.

Front

What is the definition of cosine (cos) in a right triangle?

Back

Cosine (cos) is the ratio of the length of the adjacent side to the length of the hypotenuse.

Front

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

Back

To find the measure of an angle using cosine, use the formula: angle = arccos(adjacent/hypotenuse).

Front

What is the value of cosA if the adjacent side is 3 and the hypotenuse is 5?

Back

cosA = 3/5.

Front

What is the relationship between the angles in a right triangle?

Back

The sum of the angles in a right triangle is always 180 degrees, with one angle being 90 degrees.

Front

How do you round an angle measure to the nearest degree?

Back

To round an angle measure to the nearest degree, look at the decimal part: if it's 0.5 or higher, round up; if it's less than 0.5, round down.

Front

What is the approximate measure of an angle if tanZ = 0.2917?

Back

The approximate measure of the angle is 16 degrees.

Front

What is the sine (sin) function in a right triangle?

Back

Sine (sin) is the ratio of the length of the opposite side to the length of the hypotenuse.