Trig Identities
Order by
15 terms
English | Tagalog |
|---|---|
 odd IDs | sin(-x)=-sinx, csc(-x)=-cscx, tan(-x)=-tanx, cot(-x)=-cotx |
| even IDs | cos(-x)=cosx, sec(-x)=secx |
| Pythagorean IDs | sin²x+cos²x=1, tan²x+1=sec²x, 1+cot²x=csc²x |
| sin(A+B)= | sinAcosB+cosAsinB |
| sin(A-B)= | sinAcosB-cosAsinB |
| cos(A+B)= | cosAcosB-sinAsinB |
| cos(A-B)= | cosAcosB+sinAsinB |
| tan(A+B)= | tanA+tanB/1-tanAtanB |
| tan(A-B)= | tanA-tanB/1+tanAtanB |
| sin2A= | 2sinAcosA |
| cos2A= | cos²A-sin²A, 2cos²A-1, 1-2sin²A |
| tan2A= | 2tanA/1-tan²A |
| sin(A/2) | ±√1-cosA/2 |
| cos(A/2) | ±√1+cosA/2 |
| tan(A/2) | ±√1-cosA/1+cosA, 1-cosA/sin, sin/1+cosA |
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