1. Trigonometric Identities An identity in math is : - an unconditional statement of equality - true for all values of the variable(s) for which the equation is defined

2. Trigonometric Identities An identity in math is : - an unconditional statement of equality - true for all values of the variable(s) for which the equation is defined Just think of an identity as another way of representing an equation using different terms.

3. Trigonometric Identities An identity in math is : - an unconditional statement of equality - true for all values of the variable(s) for which the equation is defined Just think of an identity as another way of representing one side of an equation using different terms.

4. Trigonometric Identities An identity in math is : - an unconditional statement of equality - true for all values of the variable(s) for which the equation is defined Just think of an identity as another way of representing one side of an equation using different terms. If I were working with an equation containing either of these terms, I can replace one with the other.

5. Trigonometric Identities An identity in math is : - an unconditional statement of equality - true for all values of the variable(s) for which the equation is defined Just think of an identity as another way of representing one side of an equation using different terms. If I were working with an equation containing either of these terms, I can replace one with the other. - we start with this equation

6. Trigonometric Identities An identity in math is : - an unconditional statement of equality - true for all values of the variable(s) for which the equation is defined Just think of an identity as another way of representing one side of an equation using different terms. If I were working with an equation containing either of these terms, I can replace one with the other. - we start with this equation - and end up with this equation

7. Trigonometric Identities Here is a list of identities that are commonly used…

8. Trigonometric Identities Here is a list of identities that are commonly used… We will use these to simplify expressions involving trigonometric functions.

9. Trigonometric Identities

10. The most difficult part of these problems is where to start.

11. Trigonometric Identities

16. ** just combined fractions

17. Trigonometric Identities

28. Squared both sides…

29. Trigonometric Identities

30. Square root of both sides…