• Pythagorean
• Cofunction
• Even-Odd
• Identities
• Others
• Equations
• Functions

Pythagorean Identities

cos² α + sin² α = 1

sec² α = 1 + tan² α

csc² α = 1 + cot² α

Cofunction Identities

Even-Odd Identities

Sum and Difference of Angles Identities

Examples

Double Angle Identities

Examples

Half Angle Identities

Examples

Sum to Product Identities

Examples

Product to Sum Identities

Examples

• 
• 
•