Flashcard #4: Trigonometric Ratios

Front

What is the definition of Cosine (Cos)?

Back

Cosine (Cos) is the ratio of the length of the adjacent side to the length of the hypotenuse in a right triangle.

Front

What is the definition of Sine (Sin)?

Back

Sine (Sin) is the ratio of the length of the opposite side to the length of the hypotenuse in a right triangle.

Front

What is the definition of Tangent (Tan)?

Back

Tangent (Tan) is the ratio of the length of the opposite side to the length of the adjacent side in a right triangle.

Front

What is the formula for Cosine in a right triangle?

Back

Cos C = Adjacent / Hypotenuse.

Front

What is the formula for Sine in a right triangle?

Back

Sin X = Opposite / Hypotenuse.

Front

What is the formula for Tangent in a right triangle?

Back

Tan = Opposite / Adjacent.

Front

If the opposite side is 15 and the hypotenuse is 17, what is Sin X?

Back

Sin X = 15/17.

Front

If the adjacent side is 40 and the hypotenuse is 41, what is Cos C?

Back

Cos C = 40/41.

Front

If the opposite side is 24 and the adjacent side is 32, what is Tan?

Back

Tan = 24/32.

Front

What is the relationship between the sides in a right triangle?

Back

In a right triangle, the square of the hypotenuse is equal to the sum of the squares of the other two sides (Pythagorean theorem).