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// How many trigonometric identities are there?
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Trig Identities - What Are They?
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- 1 // What are trig identities?
- 2 // How many trigonometric identities are there?
- 3 // What are the trig identities based on?
- 4 // How are trig functions defined by a right triangle?
- 5 // What trig functions are trig identities based on?
- 6 // What are reciprocal identities?
- 7 // How to prove reciprocal identities?
- 8 // How to remember reciprocal identities?
- 9 // What are quotient identities? How to prove quotient identities?
- 10 // What are pythagorean identities? How to prove pythagorean identities?
- 11 // How to remember pythagorean identities?
- 12 // What are even-odd identities?
- 13 // How to remember even-odd identities?
- 14 // Why are even-odd identities useful?
- 15 // What are co-function identities?
- 16 // How to remember co-function identities?
- 17 // How to prove co-function identities?
- 18 // What are sum-difference identities?
- 19 // How to remember sum-difference identities?
- 20 // Why are sum-difference identities useful?
- 21 // What are double-angle identities? What are half-angle identities?
- 22 // What are product-to-sum identities? What are the sum-to-product identities?
- 23 // How to remember product-to-sum identities?
- 24 // Summary
