Sin, Cos, Tan

Front

What is the definition of sine (sin) 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 (cos) 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 (tan) 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

If sin θ = opposite/hypotenuse, what is the formula to find the opposite side?

Back

Opposite = hypotenuse × sin θ.

Front

If cos θ = adjacent/hypotenuse, what is the formula to find the adjacent side?

Back

Adjacent = hypotenuse × cos θ.

Front

If tan θ = opposite/adjacent, what is the formula to find the opposite side?

Back

Opposite = adjacent × tan θ.

Front

Which trigonometric function would you use if you have the opposite side and hypotenuse?

Back

Sine (sin).

Front

Which trigonometric function would you use if you have the adjacent side and hypotenuse?

Back

Cosine (cos).

Front

Which trigonometric function would you use if you have the opposite side and adjacent side?

Back

Tangent (tan).

Front

What is the relationship between sine and cosine for any angle θ?

Back

sin θ = cos(90° - θ).