Setting up Trig ratios

Front

What is the sine function used for in trigonometry?

Back

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

Front

What is the tangent function used for in trigonometry?

Back

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

Front

What is the cosine function used for in trigonometry?

Back

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

Front

What is the formula for sine in terms of a right triangle?

Back

sin(θ) = opposite/hypotenuse.

Front

What is the formula for cosine in terms of a right triangle?

Back

cos(θ) = adjacent/hypotenuse.

Front

What is the formula for tangent in terms of a right triangle?

Back

tan(θ) = opposite/adjacent.

Front

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

Back

You use the sine function.

Front

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

Back

You use the cosine function.

Front

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

Back

You use the tangent function.

Front

What is the relationship between sine, cosine, and tangent?

Back

tan(θ) = sin(θ)/cos(θ).