Cot 90 Degrees
Sin, Cos, Tan, Cot of an Angle
What is cot 90°?
Answer
cot 90° =
0
Angle in radians: 90° = π/2. The point of the angle is on the y-axis: (0, 1).
cot 90° = cos 90° / sin 90° = 0 / 1 = 0
P(cos 90°, sin 90°) = (0, 1)
C(cot 90°, 1) = (0, 1) — where line OP meets the line y = 1.
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
Cotangent of nearby angles
FAQ
What is cot 90°?
cot 90° = 0
Why is cot 90° equal to 0?
The point of 90° on the unit circle is (0, 1), and cot = x / y = 0 / 1 = 0.
Why does a calculator show −0.5012 for cot 90?
The calculator is in radian mode (RAD): it takes cot 90 as the cotangent of 90 radians, cot 90 rad ≈ −0.5012. Switch it to degrees (DEG): cot 90° = 0. In radians the value is never undefined: π is irrational, so a whole number of radians never lands exactly on an axis.
See Also
- Cot 80 Degrees: Cotangent of 80° on the Unit Circle
- Cot 81 Degrees: Cotangent of 81° on the Unit Circle
- Cot 82 Degrees: Cotangent of 82° on the Unit Circle
- Cot 83 Degrees: Cotangent of 83° on the Unit Circle
- Cot 84 Degrees: Cotangent of 84° on the Unit Circle
- Cot 85 Degrees: Cotangent of 85° on the Unit Circle
- Cot 86 Degrees: Cotangent of 86° on the Unit Circle
- Cot 87 Degrees: Cotangent of 87° on the Unit Circle
- Cot 88 Degrees: Cotangent of 88° on the Unit Circle
- Cot 89 Degrees: Cotangent of 89° on the Unit Circle
- Cot 97 Degrees: Cotangent of 97° on the Unit Circle
- Cot 98 Degrees: Cotangent of 98° on the Unit Circle
- Cot 100 Degrees: Cotangent of 100° on the Unit Circle
- Cot 101 Degrees: Cotangent of 101° on the Unit Circle
- Cot 105 Degrees: Cotangent of 105° on the Unit Circle
- Cot 106 Degrees: Cotangent of 106° on the Unit Circle
- Cot 108 Degrees: Cotangent of 108° on the Unit Circle
- Cot 110 Degrees: Cotangent of 110° on the Unit Circle
- Cot 120 Degrees: Cotangent of 120° on the Unit Circle
- Cot 125 Degrees: Cotangent of 125° on the Unit Circle
- Котангенс 90 градусов (ctg 90°) на единичной окружности
- Cotangente de 90 grados (cot 90°) en el círculo unitario
- Cotangente de 90 graus (cotg 90°) no ciclo trigonométrico