# Adding Rational Expressions Involving Trigonometric Functions Video

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# Adding Rational Expressions Involving Trigonometric Functions Video Tutorial

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# Adding Rational Expressions Involving Trigonometric Functions

This math video tutorial gives a step by step explanation to a math problem on "Adding Rational Expressions Involving Trigonometric Functions".

# Expressions

An expression is a combination of numbers, operators, grouping symbols (such as brackets and parentheses) and/or free variables and bound variables arranged in a meaningful way which can be evaluated. Bound variables are assigned values within the expression (they are for internal use) while free variables can take on values from outside the expression.

# Rational Numbers

A rational number is a number which can be expressed as a ratio of two integers. Non-integer rational numbers (commonly called fractions) are usually written as the vulgar fraction a / b , where b is not zero. a is called the numerator, and b the denominator.

# Trigonometric Functions

In mathematics, the trigonometric functions are functions of an angle. They are important in the study of triangles and modeling periodic phenomena, among many other applications. Trigonometric functions are commonly defined as ratios of two sides of a right triangle containing the angle, and can equivalently be defined as the lengths of various line segments from a unit circle.