Trigonometric Identities and Functions

Front

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

Back

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

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

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

What is the Pythagorean identity?

Back

Front

What is the relationship between secant (sec) and cosine (cos)?

Back

Front

What is the relationship between cosecant (csc) and sine (sin)?

Back

Front

What is the relationship between cotangent (cot) and tangent (tan)?

Back

Front

Back

Front

What is the formula for the sine of a sum of angles?

Back

Front

What is the formula for the cosine of a sum of angles?

Back