Trig Ratios - Sin Cos Tan

Front

What is the definition of sine 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 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 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

Identify the opposite side in a right triangle with angle theta.

Back

The side opposite to angle theta.

Front

Identify the adjacent side in a right triangle with angle theta.

Back

The side next to angle theta that is not the hypotenuse.

Front

What is the formula for sine?

Back

sin(theta) = opposite / hypotenuse.

Front

What is the formula for cosine?

Back

cos(theta) = adjacent / hypotenuse.

Front

What is the formula for tangent?

Back

tan(theta) = opposite / adjacent.

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.