Cot 87 Degrees
Sin, Cos, Tan, Cot of an Angle
What is cot 87°?
Answer
cot 87° ≈
0.0524
Angle in radians: 87° = 29π/60. The point of the angle is in quadrant I, where cotangent is positive.
≈ — rounded to 4 decimal places. An exact form of cot 87° in square roots exists, but it is unwieldy — nested radicals.
cot 87° = cos 87° / sin 87° ≈ 0.0524
P(cos 87°, sin 87°) ≈ (0.0523, 0.9986)
C(cot 87°, 1) ≈ (0.0524, 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 87°?
cot 87° ≈ 0.0524
Is there an exact value of cot 87°?
Yes: 87° is a multiple of 3°, and the values of such angles can be written with square roots — but the expression is unwieldy, with nested radicals built from the values of 18° and 15° (3° = 18° − 15°). In practice the decimal is used: cot 87° ≈ 0.0524.
Why does a calculator show −0.6933 for cot 87?
The calculator is in radian mode (RAD): it takes cot 87 as the cotangent of 87 radians, cot 87 rad ≈ −0.6933. Switch it to degrees (DEG): cot 87° ≈ 0.0524. 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 77 Degrees: Cotangent of 77° on the Unit Circle
- Cot 78 Degrees: Cotangent of 78° on the Unit Circle
- Cot 79 Degrees: Cotangent of 79° on the Unit Circle
- 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 88 Degrees: Cotangent of 88° on the Unit Circle
- Cot 89 Degrees: Cotangent of 89° on the Unit Circle
- Cot 90 Degrees: Cotangent of 90° 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
- Котангенс 87 градусов (ctg 87°) на единичной окружности
- Cotangente de 87 grados (cot 87°) en el círculo unitario
- Cotangente de 87 graus (cotg 87°) no ciclo trigonométrico