Tan 65 Degrees
Sin, Cos, Tan, Cot of an Angle
What is tan 65°?
Answer
tan 65° ≈
2.1445
Angle in radians: 65° = 13π/36. The point of the angle is in quadrant I, where tangent is positive.
≈ — rounded to 4 decimal places. tan 65° can't be written with square roots: 65° is not a multiple of 3°.
tan 65° = sin 65° / cos 65° ≈ 2.1445
P(cos 65°, sin 65°) ≈ (0.4226, 0.9063)
T(1, tan 65°) ≈ (1, 2.1445) — where line OP meets the line x = 1; T is beyond the drawing, the arrow points to it.
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 65°?
tan 65° ≈ 2.1445
Why does tan 65° 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°. 65° is not, so no such exact form exists; the value is used as a decimal: tan 65° ≈ 2.1445.
Why does a calculator show −1.4700 for tan 65?
The calculator is in radian mode (RAD): it takes tan 65 as the tangent of 65 radians, tan 65 rad ≈ −1.4700. Switch it to degrees (DEG): tan 65° ≈ 2.1445. 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 55 Degrees: Tangent of 55° 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 66 Degrees: Tangent of 66° on the Unit Circle
- Tan 67 Degrees: Tangent of 67° on the Unit Circle
- Tan 68 Degrees: Tangent of 68° on the Unit Circle
- Tan 69 Degrees: Tangent of 69° on the Unit Circle
- Tan 70 Degrees: Tangent of 70° on the Unit Circle
- Tan 71 Degrees: Tangent of 71° on the Unit Circle
- Tan 72 Degrees: Tangent of 72° on the Unit Circle
- Tan 73 Degrees: Tangent of 73° on the Unit Circle
- Tan 74 Degrees: Tangent of 74° on the Unit Circle
- Tan 75 Degrees: Tangent of 75° on the Unit Circle
- Тангенс 65 градусов (tg 65°) на единичной окружности
- Tangente de 65 grados (tan 65°) en el círculo unitario
- Tangente de 65 graus (tg 65°) no ciclo trigonométrico