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Basic Trig IDs
Reciprocal, Quotient, and Pythagorean Identities
Question | Answer |
---|---|
sinx | 1/cscx |
cosx | 1/secx |
tanx | 1/cotx |
cscx | 1/sinx |
secx | 1/cosx |
cotx | 1/tanx |
tanx | sinx/cosx |
cotx | cosx/sinx |
sin^2x + cos^2x | 1 |
1 + tan^2x | sec^2x |
1 + cot^2x | csc^2x |