20 terms

square root function

A function that contains the square root of a variable.

radical function

A function that contains radicals with variables in the radicand.

radicand

The expression that is under the radical sign.

radical expression

An expression that contains a radical.

rationalizing the denominator

A method used to eliminate radicals from the denominator of a fraction.

radical equations

Equations that contain radicals with variables in the radicand.

extraneous solutions

Results that are not solutions to the original equation.

hypotenuse

The side opposite the right angle of a right triangle.

legs

The side of a right triangle that form the right angle.

converse

The statement formed by exchanging the phrases after if and then of an if-then statement.

Pythagorean triple

Counting numbers that satisfy the Pythagorean Theorem.

trigonometry

The study of the properties of triangles and trigonometric functions and their applications.

trigonometric ratio

A ratio of the lengths of side of a right triangle.

sine

For an acute angle of a right triangle, the ratio of the measure of the leg opposite the acute angle to the measure of the hypotenuse.

cosine

For an acute angle of a right triangle, the ratio of the measure of the leg adjacent to the acute angle to the measure of the hypotenuse.

tangent

For an acute angle of a right triangle, the ratio of the measure of the leg opposite the acute angle to the measure of the leg adjacent to the acute angle.

solving the triangle

Finding the measures of all of the angles and sides of a triangle.

inverse sine

If angle A is an acute angle and the sine of A is x, then the inverse sine of x is the measure of angle A.

inverse cosine

If angle A is an acute angle and the cosine of A is x, then the inverse cosine of x is the measure of angle A.

inverse tangent

If angle A is an acute angle and the tangent of A is x, then the inverse tangent of x is the measure of angle A.