Sin Cos Tan

Front

What is the cosine ratio?

Back

The cosine ratio is defined as the ratio of the length of the adjacent side to the length of the hypotenuse in a right triangle (A/H).

Front

Which trigonometric function is used when given the opposite side and hypotenuse?

Back

Sine (sin) is used when given the opposite side and hypotenuse.

Front

Which trigonometric function is used when given the two sides that are not the hypotenuse?

Back

Tangent (tan) is used when given the two sides that are not the hypotenuse.

Front

If cos 72 = 6 / x, how do you solve for x?

Back

To solve for x, rearrange the equation: x = 6 / cos 72.

Front

What does the sine function represent in a right triangle?

Back

The sine function represents the ratio of the length of the opposite side to the length of the hypotenuse (O/H).

Front

What is the tangent ratio?

Back

The tangent ratio is defined as the ratio of the length of the opposite side to the length of the adjacent side (O/A).

Front

If you have the adjacent side and the hypotenuse, which trig function should you use?

Back

You should use cosine (cos) when you have the adjacent side and the hypotenuse.

Front

Solve for x: sin 30 = x / 10. What is x?

Back

x = 10 * sin 30 = 5.

Front

What is the relationship between sine, cosine, and tangent?

Back

Tangent can be expressed as the ratio of sine to cosine: tan = sin / cos.

Front

If sin 45 = x / 10, what is x?

Back

x = 10 * sin 45 = 10 * √2 / 2 ≈ 7.1.