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Triangle Trig
Triangle Trigonometry formulas and theorems
| Question | Answer |
|---|---|
| sine of an angle in a right triangle | opposite / hypotenuse |
| cosine of an angle in a right triangle | adjacent / hypotenuse |
| tangent of an angle in a right triangle | opposite / adjacent |
| To convert degrees to radians multiply by ___ | pi / 180 |
| To convert radians to degrees multiple by ___ | 180 / pi |
| Length of a circular arc | radius * central angle |
| Area of a circular sector | A = (1/2)r^2*central angle |
| csc of an angle in a right triangle | hypotenuse / opposite |
| sec of an angle in a right triangle | hypotenuse / adjacent |
| cot of an angle in a right triangle | adjacent / opposite |
| Area of a non right triangle | (1/2)a*b*sinC |
| The Law of Sines | (sin A)/a = (sin B)/b = (sin C)/c |
| The Ambiguous Case | SSA |
| The Law of Cosines (side length a) | a^2 = b^2 + c^2 - 2bc cos A |
| The Law of Cosines (Angle A) | Cos A = (b^2 + c^2 - a^2) / (2bc) |
| Heron's Formula for area of a triangle | square root (s(s-a)(s-b)(s-c)) |
Created by:
saxmank
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