Trig!

Front

What does SOH CAH TOA stand for in trigonometry?

Back

SOH CAH TOA is a mnemonic for remembering the definitions of the sine, cosine, and tangent functions: Sine = Opposite/Hypotenuse, Cosine = Adjacent/Hypotenuse, Tangent = Opposite/Adjacent.

Front

How do you find the measure of an angle using inverse trigonometric functions?

Back

To find the measure of an angle, use the inverse trigonometric functions: sin⁻¹, cos⁻¹, or tan⁻¹, depending on the sides of the triangle you have.

Front

If the opposite side is 5 and the hypotenuse is 13, what is the sine of the angle?

Back

Sine = Opposite/Hypotenuse = 5/13 ≈ 0.3846.

Front

What is the cosine of an angle if the adjacent side is 12 and the hypotenuse is 13?

Back

Cosine = Adjacent/Hypotenuse = 12/13 ≈ 0.9231.

Front

What is the tangent of an angle if the opposite side is 9 and the adjacent side is 12?

Back

Tangent = Opposite/Adjacent = 9/12 = 0.75.

Front

What is the relationship between the angles in a right triangle?

Back

The sum of the angles in a right triangle is always 180 degrees, with one angle being 90 degrees.

Front

How do you round a number to the nearest tenth?

Back

Look at the hundredths place: if it's 5 or more, round up; if it's less than 5, round down.

Front

What is the sine function used for in trigonometry?

Back

The sine function is used to find the ratio of the length of the opposite side to the length of the hypotenuse in a right triangle.

Front

What is the cosine function used for in trigonometry?

Back

The cosine function is used to find the ratio of the length of the adjacent side to the length of the hypotenuse in a right triangle.

Front

What is the tangent function used for in trigonometry?

Back

The tangent function is used to find the ratio of the length of the opposite side to the length of the adjacent side in a right triangle.