Trig Functions

Front

What is the definition of a trigonometric function?

Back

A trigonometric function relates the angles of a triangle to the lengths of its sides.

Front

What are the three primary trigonometric functions?

Back

Sine (sin), Cosine (cos), Tangent (tan).

Front

What is the sine function?

Back

The sine function is the ratio of the length of the opposite side to the length of the hypotenuse in a right triangle.

Front

What is the cosine function?

Back

The cosine function is the ratio of the length of the adjacent side to the length of the hypotenuse in a right triangle.

Front

What is the tangent function?

Back

The tangent function is the ratio of the length of the opposite side to the length of the adjacent side in a right triangle.

Front

What is the mnemonic to remember trigonometric ratios?

Back

Soh Cah Toa.

Front

If you know the opposite side and hypotenuse, which trig function do you use?

Back

Sine.

Front

If you know the adjacent side and hypotenuse, which trig function do you use?

Back

Cosine.

Front

If you know the opposite side and adjacent side, which trig function do you use?

Back

Tangent.

Front

What is the formula for sine in a right triangle?

Back

sin(θ) = opposite/hypotenuse.