Finding Missing Sides and Angles Right Triangle Trig Review

Front

What is the Pythagorean theorem?

Back

In a right triangle, the square of the length of the hypotenuse (c) is equal to the sum of the squares of the lengths of the other two sides (a and b). Formula: c² = a² + b².

Front

What is the sine function in a right triangle?

Back

The sine of an angle is the ratio of the length of the opposite side to the length of the hypotenuse. Formula: sin(θ) = opposite/hypotenuse.

Front

What is the cosine function in a right triangle?

Back

The cosine of an angle is the ratio of the length of the adjacent side to the length of the hypotenuse. Formula: cos(θ) = adjacent/hypotenuse.

Front

What is the tangent function in a right triangle?

Back

The tangent of an angle is the ratio of the length of the opposite side to the length of the adjacent side. Formula: tan(θ) = opposite/adjacent.

Front

How do you find the length of a side in a right triangle using trigonometric ratios?

Back

Use the appropriate trigonometric function (sine, cosine, or tangent) based on the known angle and the sides you have.

Front

What is the relationship between degrees and radians?

Back

Degrees and radians are two units for measuring angles. 180 degrees is equal to π radians.

Front

When should you use the sine function?

Back

Use the sine function when you know an angle and the length of the hypotenuse, and you need to find the length of the opposite side.

Front

When should you use the cosine function?

Back

Use the cosine function when you know an angle and the length of the hypotenuse, and you need to find the length of the adjacent side.

Front

When should you use the tangent function?

Back

Use the tangent function when you know an angle and the lengths of the opposite and adjacent sides.

Front

What is the purpose of using a scientific calculator in trigonometry?

Back

A scientific calculator can compute trigonometric functions and convert between degrees and radians.