Trigonometric Ratios and Functions

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

What is the formula to find sine of an angle?

Back

sin(θ) = opposite/hypotenuse.

Front

What is the formula to find cosine of an angle?

Back

cos(θ) = adjacent/hypotenuse.

Front

What is the formula to find tangent of an angle?

Back

tan(θ) = opposite/adjacent.

Front

If the opposite side is 12 and the hypotenuse is 37, what is sin D?

Back

sin D = 12/37.

Front

If the adjacent side is 35 and the hypotenuse is 37, what is cos D?

Back

cos D = 35/37.

Front

If the opposite side is 12 and the adjacent side is 35, what is tan D?

Back

tan D = 12/35.

Front

What is the relationship between sine and cosine?

Back

sin(θ) = cos(90° - θ).