Cos 25 Degrees
Sin, Cos, Tan, Cot of an Angle
What is cos 25°?
Answer
cos 25° ≈
0.9063
Angle in radians: 25° = 5π/36. The point of the angle is in quadrant I, where cosine is positive.
≈ — rounded to 4 decimal places. cos 25° can't be written with square roots: 25° is not a multiple of 3°.
P(cos 25°, sin 25°) ≈ (0.9063, 0.4226)
P(cos 25°, sin 25°) ≈ (0.9063, 0.4226)
Highlighted: the projection on the x-axis — cosine, x ≈ 0.9063.
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 25°?
cos 25° ≈ 0.9063
Why does cos 25° 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°. 25° is not, so no such exact form exists; the value is used as a decimal: cos 25° ≈ 0.9063.
Why does a calculator show 0.9912 for cos 25?
The calculator is in radian mode (RAD): it takes cos 25 as the cosine of 25 radians, cos 25 rad ≈ 0.9912. Switch it to degrees (DEG): cos 25° ≈ 0.9063. 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 15 Degrees: Cosine of 15° on the Unit Circle
- Cos 16 Degrees: Cosine of 16° on the Unit Circle
- Cos 17 Degrees: Cosine of 17° on the Unit Circle
- Cos 18 Degrees: Cosine of 18° on the Unit Circle
- Cos 19 Degrees: Cosine of 19° on the Unit Circle
- Cos 20 Degrees: Cosine of 20° on the Unit Circle
- Cos 21 Degrees: Cosine of 21° on the Unit Circle
- Cos 22 Degrees: Cosine of 22° on the Unit Circle
- Cos 23 Degrees: Cosine of 23° on the Unit Circle
- Cos 24 Degrees: Cosine of 24° on the Unit Circle
- Cos 26 Degrees: Cosine of 26° on the Unit Circle
- Cos 27 Degrees: Cosine of 27° on the Unit Circle
- Cos 28 Degrees: Cosine of 28° on the Unit Circle
- Cos 29 Degrees: Cosine of 29° on the Unit Circle
- Cos 30 Degrees: Cosine of 30° on the Unit Circle
- Cos 31 Degrees: Cosine of 31° on the Unit Circle
- Cos 32 Degrees: Cosine of 32° on the Unit Circle
- Cos 33 Degrees: Cosine of 33° on the Unit Circle
- Cos 34 Degrees: Cosine of 34° on the Unit Circle
- Cos 35 Degrees: Cosine of 35° on the Unit Circle
- Косинус 25 градусов (cos 25°) на единичной окружности
- Coseno de 25 grados (cos 25°) en el círculo unitario
- Cosseno de 25 graus (cos 25°) no ciclo trigonométrico