Cos 86 Degrees
Sin, Cos, Tan, Cot of an Angle
What is cos 86°?
Answer
cos 86° ≈
0.0698
Angle in radians: 86° = 43π/90. The point of the angle is in quadrant I, where cosine is positive.
≈ — rounded to 4 decimal places. cos 86° can't be written with square roots: 86° is not a multiple of 3°.
P(cos 86°, sin 86°) ≈ (0.0698, 0.9976)
P(cos 86°, sin 86°) ≈ (0.0698, 0.9976)
Highlighted: the projection on the x-axis — cosine, x ≈ 0.0698.
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 86°?
cos 86° ≈ 0.0698
Why does cos 86° 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°. 86° is not, so no such exact form exists; the value is used as a decimal: cos 86° ≈ 0.0698.
Why does a calculator show −0.3837 for cos 86?
The calculator is in radian mode (RAD): it takes cos 86 as the cosine of 86 radians, cos 86 rad ≈ −0.3837. Switch it to degrees (DEG): cos 86° ≈ 0.0698. 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 76 Degrees: Cosine of 76° on the Unit Circle
- Cos 77 Degrees: Cosine of 77° on the Unit Circle
- Cos 78 Degrees: Cosine of 78° on the Unit Circle
- Cos 79 Degrees: Cosine of 79° on the Unit Circle
- Cos 80 Degrees: Cosine of 80° on the Unit Circle
- Cos 81 Degrees: Cosine of 81° on the Unit Circle
- Cos 82 Degrees: Cosine of 82° on the Unit Circle
- Cos 83 Degrees: Cosine of 83° on the Unit Circle
- Cos 84 Degrees: Cosine of 84° on the Unit Circle
- Cos 85 Degrees: Cosine of 85° on the Unit Circle
- Cos 87 Degrees: Cosine of 87° on the Unit Circle
- Cos 88 Degrees: Cosine of 88° on the Unit Circle
- Cos 89 Degrees: Cosine of 89° on the Unit Circle
- Cos 90 Degrees: Cosine of 90° on the Unit Circle
- Cos 97 Degrees: Cosine of 97° on the Unit Circle
- Cos 98 Degrees: Cosine of 98° on the Unit Circle
- Cos 100 Degrees: Cosine of 100° on the Unit Circle
- Cos 101 Degrees: Cosine of 101° on the Unit Circle
- Cos 105 Degrees: Cosine of 105° on the Unit Circle
- Cos 106 Degrees: Cosine of 106° on the Unit Circle
- Косинус 86 градусов (cos 86°) на единичной окружности
- Coseno de 86 grados (cos 86°) en el círculo unitario
- Cosseno de 86 graus (cos 86°) no ciclo trigonométrico