Cos 227 Degrees
Sin, Cos, Tan, Cot of an Angle
What is cos 227°?
Answer
cos 227° ≈
−0.6820
Angle in radians: 227° = 227π/180. The point of the angle is in quadrant III, where cosine is negative.
≈ — rounded to 4 decimal places. cos 227° can't be written with square roots: 227° is not a multiple of 3°.
cos 227° = cos(180° + 47°) = −cos 47° ≈ −0.6820
P(cos 227°, sin 227°) ≈ (−0.6820, −0.7314)
P(cos 227°, sin 227°) ≈ (−0.6820, −0.7314)
Highlighted: the projection on the x-axis — cosine, x ≈ −0.6820.
See Also
- Arcsin, Arccos, Arctan, Arccot - The angle from the value of its sine, cosine, tangent or cotangent: exact in degrees and π, with the check and the unit circle
- Square Root Calculator - Calculate the square root of any number
- Simplify Square Root Calculator - Write any square root in simplest radical form, step by step
- Geometry Formulas: Area, Volume, Perimeter - The formula for every standard shape, where it comes from, and worked examples
Cosine of nearby angles
| Angle | cos |
|---|---|
| 215° | ≈ −0.8192 |
| 216° | −(√5 + 1)/4 |
| 225° | −√2/2 |
| 227° | ≈ −0.6820 |
| 234° | −√(10 − 2√5)/4 |
| 240° | −1/2 |
| 252° | −(√5 − 1)/4 |
FAQ
What is cos 227°?
cos 227° ≈ −0.6820
Why does cos 227° have no exact value?
A trigonometric value of a whole number of degrees can be written with square roots only when the angle is a multiple of 3°. 227° is not, so no such exact form exists; the value is used as a decimal: cos 227° ≈ −0.6820.
Why does a calculator show 0.6929 for cos 227?
The calculator is in radian mode (RAD): it takes cos 227 as the cosine of 227 radians, cos 227 rad ≈ 0.6929. Switch it to degrees (DEG): cos 227° ≈ −0.6820. In radians the value is never undefined: π is irrational, so a whole number of radians never lands exactly on an axis.
See Also
- Cos 179 Degrees: Cosine of 179° on the Unit Circle
- Cos 180 Degrees: Cosine of 180° on the Unit Circle
- Cos 195 Degrees: Cosine of 195° on the Unit Circle
- Cos 198 Degrees: Cosine of 198° on the Unit Circle
- Cos 200 Degrees: Cosine of 200° on the Unit Circle
- Cos 210 Degrees: Cosine of 210° on the Unit Circle
- Cos 211 Degrees: Cosine of 211° on the Unit Circle
- Cos 215 Degrees: Cosine of 215° on the Unit Circle
- Cos 216 Degrees: Cosine of 216° on the Unit Circle
- Cos 225 Degrees: Cosine of 225° on the Unit Circle
- Cos 234 Degrees: Cosine of 234° on the Unit Circle
- Cos 240 Degrees: Cosine of 240° on the Unit Circle
- Cos 252 Degrees: Cosine of 252° on the Unit Circle
- Cos 255 Degrees: Cosine of 255° on the Unit Circle
- Cos 270 Degrees: Cosine of 270° on the Unit Circle
- Cos 285 Degrees: Cosine of 285° on the Unit Circle
- Cos 288 Degrees: Cosine of 288° on the Unit Circle
- Cos 300 Degrees: Cosine of 300° on the Unit Circle
- Cos 306 Degrees: Cosine of 306° on the Unit Circle
- Cos 315 Degrees: Cosine of 315° on the Unit Circle
- Косинус 227 градусов (cos 227°) на единичной окружности
- Coseno de 227 grados (cos 227°) en el círculo unitario
- Cosseno de 227 graus (cos 227°) no ciclo trigonométrico