8.2 - Trig - Finding Sides

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 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 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

How do you find the length of a side using the sine function?

Back

To find the length of a side using the sine function, use the equation: Sin(θ) = opposite/hypotenuse.

Front

How do you find the length of a side using the cosine function?

Back

To find the length of a side using the cosine function, use the equation: Cos(θ) = adjacent/hypotenuse.

Front

How do you find the length of a side using the tangent function?

Back

To find the length of a side using the tangent function, use the equation: Tan(θ) = opposite/adjacent.

Front

What is the Pythagorean theorem?

Back

The Pythagorean theorem states that 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): c² = a² + b².

Front

If sin(θ) = 0.5, what is θ?

Back

θ = 30° or θ = 150° (in the range of 0° to 360°).

Front

What is the relationship between sine and cosine?

Back

Sine and cosine are co-functions: Sin(θ) = Cos(90° - θ).

Front

How do you round a number to the nearest tenth?

Back

To round a number to the nearest tenth, look at the hundredths place. If it is 5 or greater, round up the tenths place by one. If it is less than 5, keep the tenths place the same.