Trig ratios flashcard1

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 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 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

What is the formula to calculate Cosine?

Back

Cosine = Adjacent / Hypotenuse.

Front

What is the formula to calculate Sine?

Back

Sine = Opposite / Hypotenuse.

Front

What is the formula to calculate Tangent?

Back

Tangent = Opposite / Adjacent.

Front

If Cos Z = 18/30, what is the adjacent side if the hypotenuse is 30?

Back

The adjacent side is 18.

Front

If Sin A = 30/34, what is the opposite side if the hypotenuse is 34?

Back

The opposite side is 30.

Front

If Tan C = 16/30, what is the adjacent side if the opposite side is 16?

Back

The adjacent side is 30/16.

Front

What is the relationship between the three trigonometric ratios?

Back

The three ratios are related through the Pythagorean theorem: Sin² + Cos² = 1.