Tan 8 Degrees
Sin, Cos, Tan, Cot of an Angle
What is tan 8°?
Answer
tan 8° ≈
0.1405
Angle in radians: 8° = 2π/45. The point of the angle is in quadrant I, where tangent is positive.
≈ — rounded to 4 decimal places. tan 8° can't be written with square roots: 8° is not a multiple of 3°.
tan 8° = sin 8° / cos 8° ≈ 0.1405
P(cos 8°, sin 8°) ≈ (0.9903, 0.1392)
T(1, tan 8°) ≈ (1, 0.1405) — 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 8°?
tan 8° ≈ 0.1405
Why does tan 8° 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°. 8° is not, so no such exact form exists; the value is used as a decimal: tan 8° ≈ 0.1405.
Why does a calculator show −6.7997 for tan 8?
The calculator is in radian mode (RAD): it takes tan 8 as the tangent of 8 radians, tan 8 rad ≈ −6.7997. Switch it to degrees (DEG): tan 8° ≈ 0.1405. In radians the value is never undefined: π is irrational, so a whole number of radians never lands exactly on an axis.
See Also
- Sin 690 Degrees: Sine of 690° on the Unit Circle
- Sin 720 Degrees: Sine of 720° on the Unit Circle
- Tan 0 Degrees: Tangent of 0° on the Unit Circle
- Tan 1 Degree: Tangent of 1° on the Unit Circle
- Tan 2 Degrees: Tangent of 2° on the Unit Circle
- Tan 3 Degrees: Tangent of 3° on the Unit Circle
- Tan 4 Degrees: Tangent of 4° on the Unit Circle
- Tan 5 Degrees: Tangent of 5° on the Unit Circle
- Tan 6 Degrees: Tangent of 6° on the Unit Circle
- Tan 7 Degrees: Tangent of 7° on the Unit Circle
- Tan 9 Degrees: Tangent of 9° on the Unit Circle
- Tan 10 Degrees: Tangent of 10° on the Unit Circle
- Tan 11 Degrees: Tangent of 11° on the Unit Circle
- Tan 12 Degrees: Tangent of 12° on the Unit Circle
- Tan 13 Degrees: Tangent of 13° on the Unit Circle
- Tan 14 Degrees: Tangent of 14° on the Unit Circle
- Tan 15 Degrees: Tangent of 15° on the Unit Circle
- Tan 16 Degrees: Tangent of 16° on the Unit Circle
- Tan 17 Degrees: Tangent of 17° on the Unit Circle
- Tan 18 Degrees: Tangent of 18° on the Unit Circle
- Тангенс 8 градусов (tg 8°) на единичной окружности
- Tangente de 8 grados (tan 8°) en el círculo unitario
- Tangente de 8 graus (tg 8°) no ciclo trigonométrico