Cos 211 Degrees
Sin, Cos, Tan, Cot of an Angle
What is cos 211°?
Answer
cos 211° ≈
−0.8572
Angle in radians: 211° = 211π/180. The point of the angle is in quadrant III, where cosine is negative.
≈ — rounded to 4 decimal places. cos 211° can't be written with square roots: 211° is not a multiple of 3°.
cos 211° = cos(180° + 31°) = −cos 31° ≈ −0.8572
P(cos 211°, sin 211°) ≈ (−0.8572, −0.5150)
P(cos 211°, sin 211°) ≈ (−0.8572, −0.5150)
Highlighted: the projection on the x-axis — cosine, x ≈ −0.8572.
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
FAQ
What is cos 211°?
cos 211° ≈ −0.8572
Why does cos 211° 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°. 211° is not, so no such exact form exists; the value is used as a decimal: cos 211° ≈ −0.8572.
Why does a calculator show −0.8711 for cos 211?
The calculator is in radian mode (RAD): it takes cos 211 as the cosine of 211 radians, cos 211 rad ≈ −0.8711. Switch it to degrees (DEG): cos 211° ≈ −0.8572. 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 164 Degrees: Cosine of 164° on the Unit Circle
- Cos 165 Degrees: Cosine of 165° on the Unit Circle
- Cos 167 Degrees: Cosine of 167° on the Unit Circle
- Cos 175 Degrees: Cosine of 175° on the Unit Circle
- 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 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 227 Degrees: Cosine of 227° 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
- Косинус 211 градусов (cos 211°) на единичной окружности
- Coseno de 211 grados (cos 211°) en el círculo unitario
- Cosseno de 211 graus (cos 211°) no ciclo trigonométrico