In this section, you will learn how to add and subtract rational expressions involving trig functions. Before attempting this section, you should know the Pythagorean identities.

In this section, you will learn how to add and subtract rational expressions involving trig functions. Before attempting this section, you should know the Pythagorean identities.

- Pre-Calculus - how to add two trigonometric expressions without finding the LCDBrian McLogan\(\dfrac{\sin x}{\csc x} + \dfrac{\cos x}{\sec x}\)
- Pre-Calculus - Subtracting two trig rational expression and the simplifying the differenceBrian McLogan\(\dfrac{\sec x}{\sin x} - \dfrac{\sin x}{\cos x}\)
- Pc Unit 4 How to subtract two rational trigonometric expressionsBrian McLogan\(\dfrac{\sec x}{\sin x} - \dfrac{\sin x}{\cos x}\)
- Pre-Calculus - Adding two rational trigonometric expressions (cosθ/sinθ)+(sinθ/cosθ)Brian McLogan\(\dfrac{\cos x}{\sin x} + \dfrac{\sin x }{\cos x}\)