Cos 164 Degrees
Sin, Cos, Tan, Cot of an Angle
What is cos 164°?
Answer
cos 164° ≈
−0.9613
Angle in radians: 164° = 41π/45. The point of the angle is in quadrant II, where cosine is negative.
≈ — rounded to 4 decimal places. cos 164° can't be written with square roots: 164° is not a multiple of 3°.
cos 164° = cos(180° − 16°) = −cos 16° ≈ −0.9613
P(cos 164°, sin 164°) ≈ (−0.9613, 0.2756)
P(cos 164°, sin 164°) ≈ (−0.9613, 0.2756)
Highlighted: the projection on the x-axis — cosine, x ≈ −0.9613.
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 164°?
cos 164° ≈ −0.9613
Why does cos 164° 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°. 164° is not, so no such exact form exists; the value is used as a decimal: cos 164° ≈ −0.9613.
Why does a calculator show 0.8038 for cos 164?
The calculator is in radian mode (RAD): it takes cos 164 as the cosine of 164 radians, cos 164 rad ≈ 0.8038. Switch it to degrees (DEG): cos 164° ≈ −0.9613. 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 134 Degrees: Cosine of 134° on the Unit Circle
- Cos 135 Degrees: Cosine of 135° on the Unit Circle
- Cos 140 Degrees: Cosine of 140° on the Unit Circle
- Cos 142 Degrees: Cosine of 142° on the Unit Circle
- Cos 144 Degrees: Cosine of 144° on the Unit Circle
- Cos 145 Degrees: Cosine of 145° on the Unit Circle
- Cos 150 Degrees: Cosine of 150° on the Unit Circle
- Cos 159 Degrees: Cosine of 159° on the Unit Circle
- Cos 160 Degrees: Cosine of 160° on the Unit Circle
- Cos 162 Degrees: Cosine of 162° 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 211 Degrees: Cosine of 211° on the Unit Circle
- Косинус 164 градусов (cos 164°) на единичной окружности
- Coseno de 164 grados (cos 164°) en el círculo unitario
- Cosseno de 164 graus (cos 164°) no ciclo trigonométrico