Tan 55 Degrees
Sin, Cos, Tan, Cot of an Angle
What is tan 55°?
Answer
tan 55° ≈
1.4281
Angle in radians: 55° = 11π/36. The point of the angle is in quadrant I, where tangent is positive.
≈ — rounded to 4 decimal places. tan 55° can't be written with square roots: 55° is not a multiple of 3°.
tan 55° = sin 55° / cos 55° ≈ 1.4281
P(cos 55°, sin 55°) ≈ (0.5736, 0.8192)
T(1, tan 55°) ≈ (1, 1.4281) — where line OP meets the line x = 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
Tangent of nearby angles
FAQ
What is tan 55°?
tan 55° ≈ 1.4281
Why does tan 55° 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°. 55° is not, so no such exact form exists; the value is used as a decimal: tan 55° ≈ 1.4281.
Why does a calculator show −45.1831 for tan 55?
The calculator is in radian mode (RAD): it takes tan 55 as the tangent of 55 radians, tan 55 rad ≈ −45.1831. Switch it to degrees (DEG): tan 55° ≈ 1.4281. In radians the value is never undefined: π is irrational, so a whole number of radians never lands exactly on an axis.
See Also
- Tan 45 Degrees: Tangent of 45° on the Unit Circle
- Tan 46 Degrees: Tangent of 46° on the Unit Circle
- Tan 47 Degrees: Tangent of 47° on the Unit Circle
- Tan 48 Degrees: Tangent of 48° on the Unit Circle
- Tan 49 Degrees: Tangent of 49° on the Unit Circle
- Tan 50 Degrees: Tangent of 50° on the Unit Circle
- Tan 51 Degrees: Tangent of 51° on the Unit Circle
- Tan 52 Degrees: Tangent of 52° on the Unit Circle
- Tan 53 Degrees: Tangent of 53° on the Unit Circle
- Tan 54 Degrees: Tangent of 54° on the Unit Circle
- Tan 56 Degrees: Tangent of 56° on the Unit Circle
- Tan 57 Degrees: Tangent of 57° on the Unit Circle
- Tan 58 Degrees: Tangent of 58° on the Unit Circle
- Tan 59 Degrees: Tangent of 59° on the Unit Circle
- Tan 60 Degrees: Tangent of 60° on the Unit Circle
- Tan 61 Degrees: Tangent of 61° on the Unit Circle
- Tan 62 Degrees: Tangent of 62° on the Unit Circle
- Tan 63 Degrees: Tangent of 63° on the Unit Circle
- Tan 64 Degrees: Tangent of 64° on the Unit Circle
- Tan 65 Degrees: Tangent of 65° on the Unit Circle
- Тангенс 55 градусов (tg 55°) на единичной окружности
- Tangente de 55 grados (tan 55°) en el círculo unitario
- Tangente de 55 graus (tg 55°) no ciclo trigonométrico