Sine, Cosine, and Tangent Ratios (4.8)

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

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

Back

Sine.

Front

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

Back

Cosine.

Front

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

Back

Tangent.

Front

What is the relationship between sine and cosine for complementary angles?

Back

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