Trigonometry

Front

What is the definition of sine in a right triangle?

Back

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

Front

What is the definition of cosine in a right triangle?

Back

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

Front

What is the definition of tangent in a right triangle?

Back

Tangent (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 inverse of sine on a calculator?

Back

Use the 2nd key followed by sin-1.

Front

How do you find the inverse of cosine on a calculator?

Back

Use the 2nd key followed by cos-1.

Front

How do you find the inverse of tangent on a calculator?

Back

Use the 2nd key followed by tan-1.

Front

What is the Pythagorean theorem?

Back

In a right triangle, the square of the length of the hypotenuse is equal to the sum of the squares of the lengths of the other two sides (a² + b² = c²).

Front

What is the relationship between sine and cosine?

Back

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

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.