Trigonometric Functions Flashcard

Front

What are the six primary trigonometric functions?

Back

Sine, Cosine, Tangent, Cosecant, Secant, Cotangent.

Tags

CCSS.HSG.SRT.C.6

Front

What is the definition of sine in a right triangle?

Back

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

Tags

CCSS.HSG.SRT.C.6

Front

What is the definition of cosine in a right triangle?

Back

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

Tags

CCSS.HSG.SRT.C.6

Front

What is the definition of tangent in a right triangle?

Back

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

Tags

CCSS.HSG.SRT.C.6

Front

What is the relationship between sine and cosine?

Back

Sine and cosine are cofunctions; sin(θ) = cos(90° - θ) and cos(θ) = sin(90° - θ).

Tags

CCSS.HSG.SRT.C.7

Front

What is the Pythagorean identity involving sine and cosine?

Back

sin²(θ) + cos²(θ) = 1.

Tags

CCSS.HSF.TF.C.8

Front

What is the reference angle?

Back

The reference angle is the acute angle formed by the terminal side of an angle and the x-axis.

Front

How do you find the reference angle for an angle in the second quadrant?

Back

Subtract the angle from 180°.

Tags

CCSS.HSF.TF.B.7

Front

How do you find the reference angle for an angle in the third quadrant?

Back

Subtract 180° from the angle.

Tags

CCSS.HSF.TF.B.7

Front

How do you find the reference angle for an angle in the fourth quadrant?

Back

Subtract the angle from 360°.

Tags

CCSS.HSF.TF.B.7