Ch 5.2 Practice Flashcard

Front

What is the cosine ratio in a right triangle?

Back

The cosine ratio is defined as the ratio of the length of the adjacent side to the length of the hypotenuse.

Front

What is the sine ratio in a right triangle?

Back

The sine ratio is defined as the ratio of the length of the opposite side to the length of the hypotenuse.

Front

What is the tangent ratio in a right triangle?

Back

The tangent ratio is defined as the ratio of the length of the opposite side to the length of the adjacent side.

Front

If cos(57) = x/20, what is the value of x?

Back

x = 20 * cos(57) ≈ 11.4.

Front

If sin(33) = x/14, what is the value of x?

Back

x = 14 * sin(33) ≈ 7.5.

Front

What is the formula to find the length of a side in a right triangle using sine?

Back

The formula is: opposite side = hypotenuse * sin(angle).

Front

What is the formula to find the length of a side in a right triangle using cosine?

Back

The formula is: adjacent side = hypotenuse * cos(angle).

Front

What is the formula to find the length of a side in a right triangle using tangent?

Back

The formula is: opposite side = adjacent side * tan(angle).

Front

If the opposite side is 10 and the hypotenuse is 15, what is sin(theta)?

Back

sin(theta) = opposite/hypotenuse = 10/15 = 2/3.

Front

If the adjacent side is 12 and the hypotenuse is 13, what is cos(theta)?

Back

cos(theta) = adjacent/hypotenuse = 12/13.