Sine and Cosine Ratio

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 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 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 sin D = 4/5, what is the length of the opposite side if the hypotenuse is 20?

Back

The length of the opposite side is 16.

Front

If cos E = 4/5, what is the length of the adjacent side if the hypotenuse is 25?

Back

The length of the adjacent side is 20.

Front

What is the relationship between sine and cosine for complementary angles?

Back

For complementary angles, sin(θ) = cos(90° - θ).

Front

How do you find the hypotenuse using sine?

Back

Hypotenuse = opposite side / sin(angle).

Front

How do you find the adjacent side using cosine?

Back

Adjacent side = hypotenuse * cos(angle).

Front

What is the Pythagorean theorem?

Back

In a right triangle, a² + b² = c², where c is the hypotenuse.

Front

If the opposite side is 3 and the hypotenuse is 5, what is sin A?

Back

sin A = 3/5.