Cos 61 Degrees
Sin, Cos, Tan, Cot of an Angle
What is cos 61°?
Answer
cos 61° ≈
0.4848
Angle in radians: 61° = 61π/180. The point of the angle is in quadrant I, where cosine is positive.
≈ — rounded to 4 decimal places. cos 61° can't be written with square roots: 61° is not a multiple of 3°.
P(cos 61°, sin 61°) ≈ (0.4848, 0.8746)
P(cos 61°, sin 61°) ≈ (0.4848, 0.8746)
Highlighted: the projection on the x-axis — cosine, x ≈ 0.4848.
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
Cosine of nearby angles
FAQ
What is cos 61°?
cos 61° ≈ 0.4848
Why does cos 61° 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°. 61° is not, so no such exact form exists; the value is used as a decimal: cos 61° ≈ 0.4848.
Why does a calculator show −0.2581 for cos 61?
The calculator is in radian mode (RAD): it takes cos 61 as the cosine of 61 radians, cos 61 rad ≈ −0.2581. Switch it to degrees (DEG): cos 61° ≈ 0.4848. In radians the value is never undefined: π is irrational, so a whole number of radians never lands exactly on an axis.
See Also
- Cos 51 Degrees: Cosine of 51° on the Unit Circle
- Cos 52 Degrees: Cosine of 52° on the Unit Circle
- Cos 53 Degrees: Cosine of 53° on the Unit Circle
- Cos 54 Degrees: Cosine of 54° on the Unit Circle
- Cos 55 Degrees: Cosine of 55° on the Unit Circle
- Cos 56 Degrees: Cosine of 56° on the Unit Circle
- Cos 57 Degrees: Cosine of 57° on the Unit Circle
- Cos 58 Degrees: Cosine of 58° on the Unit Circle
- Cos 59 Degrees: Cosine of 59° on the Unit Circle
- Cos 60 Degrees: Cosine of 60° on the Unit Circle
- Cos 62 Degrees: Cosine of 62° on the Unit Circle
- Cos 63 Degrees: Cosine of 63° on the Unit Circle
- Cos 64 Degrees: Cosine of 64° on the Unit Circle
- Cos 65 Degrees: Cosine of 65° on the Unit Circle
- Cos 66 Degrees: Cosine of 66° on the Unit Circle
- Cos 67 Degrees: Cosine of 67° on the Unit Circle
- Cos 68 Degrees: Cosine of 68° on the Unit Circle
- Cos 69 Degrees: Cosine of 69° on the Unit Circle
- Cos 70 Degrees: Cosine of 70° on the Unit Circle
- Cos 71 Degrees: Cosine of 71° on the Unit Circle
- Косинус 61 градуса (cos 61°) на единичной окружности
- Coseno de 61 grados (cos 61°) en el círculo unitario
- Cosseno de 61 graus (cos 61°) no ciclo trigonométrico