Table of Trigonometric Identities
Reciprocal identities
Pythagorean Identities
Quotient Identities
Co-Function Identities
Even-Odd Identities
Sum-Difference Formulas
Double Angle Formulas
Power-Reducing/Half Angle Formulas
Sum-to-Product Formulas
Product-to-Sum Formulas

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Luis Valdez-Sanchez