Trig Missing Angles

Front

What is the sine function?

Back

The sine function (sin) is a trigonometric function that relates the angle of a right triangle to the ratio of the length of the opposite side to the length of the hypotenuse.

Front

What is the cosine function?

Back

The cosine function (cos) is a trigonometric function that relates the angle of a right triangle to the ratio of the length of the adjacent side to the length of the hypotenuse.

Front

What is the tangent function?

Back

The tangent function (tan) is a trigonometric function that relates the angle of a right triangle to the ratio of the length of the opposite side to the length of the adjacent side.

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

How do you find a missing angle in a right triangle?

Back

To find a missing angle in a right triangle, you can use the sine, cosine, or tangent functions, depending on the known sides.

Front

What is the inverse sine function?

Back

The inverse sine function (sin⁻¹) is used to find the angle whose sine is a given number.

Front

What is the inverse cosine function?

Back

The inverse cosine function (cos⁻¹) is used to find the angle whose cosine is a given number.

Front

What is the inverse tangent function?

Back

The inverse tangent function (tan⁻¹) is used to find the angle whose tangent is a given number.

Front

How do you round an angle to the nearest tenth?

Back

To round an angle to the nearest tenth, look at the hundredths place. If it is 5 or greater, round up; if it is less than 5, round down.

Front

What is the relationship between angles in a triangle?

Back

The sum of the interior angles in a triangle is always 180 degrees.