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Essence
Memorizing
Basic Formulas
Sum and Difference Formulas
Double & Triple Angle Formulas
Half Angle Formulas
Product to Sum Formulas
Sum to Product Formulas
All Formulas
Summarizing
Examples
Exercises
Final thoughts
Basic trigonometric identities
These formulas are very important. You shouldn't go any farther without knowing them. If you already know them, you can go ahead and continue to the next page.
Quotient Identities
Reciprocal Identities
Pythagorean Identities
Even-Odd Identities
Derived
formulas
Quotient Identities
Reciprocal Identities
Pythagorean Identities
Even-Odd Identities
Derived formulas
,
if k is an odd integer,
,
if k is an even integer.
