Trigonometric Ratios Review

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 the sine of an angle?

Back

sin(θ) = Opposite / Hypotenuse.

Front

What is the formula to find the cosine of an angle?

Back

cos(θ) = Adjacent / Hypotenuse.

Front

What is the formula to find the tangent of an angle?

Back

tan(θ) = Opposite / Adjacent.

Front

If sin(45°) = x/13, what is the value of x?

Back

x = 13 * sin(45°) = 9.2 (approximately).

Front

If cos(30°) = x/10, what is the value of x?

Back

x = 10 * cos(30°) = 8.66 (approximately).

Front

What is the value of sin(90°)?

Back

sin(90°) = 1.

Front

What is the value of cos(0°)?

Back

cos(0°) = 1.