Cos 49 Degrees
Sin, Cos, Tan, Cot of an Angle
What is cos 49°?
Answer
cos 49° ≈
0.6561
Angle in radians: 49° = 49π/180. The point of the angle is in quadrant I, where cosine is positive.
≈ — rounded to 4 decimal places. cos 49° can't be written with square roots: 49° is not a multiple of 3°.
P(cos 49°, sin 49°) ≈ (0.6561, 0.7547)
P(cos 49°, sin 49°) ≈ (0.6561, 0.7547)
Highlighted: the projection on the x-axis — cosine, x ≈ 0.6561.
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 49°?
cos 49° ≈ 0.6561
Why does cos 49° 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°. 49° is not, so no such exact form exists; the value is used as a decimal: cos 49° ≈ 0.6561.
Why does a calculator show 0.3006 for cos 49?
The calculator is in radian mode (RAD): it takes cos 49 as the cosine of 49 radians, cos 49 rad ≈ 0.3006. Switch it to degrees (DEG): cos 49° ≈ 0.6561. 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 39 Degrees: Cosine of 39° on the Unit Circle
- Cos 40 Degrees: Cosine of 40° on the Unit Circle
- Cos 41 Degrees: Cosine of 41° on the Unit Circle
- Cos 42 Degrees: Cosine of 42° on the Unit Circle
- Cos 43 Degrees: Cosine of 43° on the Unit Circle
- Cos 44 Degrees: Cosine of 44° on the Unit Circle
- Cos 45 Degrees: Cosine of 45° on the Unit Circle
- Cos 46 Degrees: Cosine of 46° on the Unit Circle
- Cos 47 Degrees: Cosine of 47° on the Unit Circle
- Cos 48 Degrees: Cosine of 48° on the Unit Circle
- Cos 50 Degrees: Cosine of 50° on the Unit Circle
- 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
- Косинус 49 градусов (cos 49°) на единичной окружности
- Coseno de 49 grados (cos 49°) en el círculo unitario
- Cosseno de 49 graus (cos 49°) no ciclo trigonométrico