Sin, Cos and 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

If you are given the opposite side and hypotenuse, which trig function should you use?

Back

Sine (sin) should be used.

Front

If you are given the two sides that are not the hypotenuse, which trig function should you use?

Back

Tangent (tan) should be used.

Front

Which letter represents the HYPOTENUSE in a right triangle labeled A, B, C?

Back

B represents the hypotenuse.

Front

Calculate sin X if the opposite side is 15 and the hypotenuse is 17.

Back

sin X = 15/17.

Front

Calculate tan X if the opposite side is 3 and the adjacent side is 4.

Back

tan X = 3/4.

Front

What is the relationship between sine and cosine in a right triangle?

Back

sin²X + cos²X = 1.

Front

What is the value of cos X if sin X = 15/17?

Back

cos X = 8/17.