Sin 64 Degrees
Sin, Cos, Tan, Cot of an Angle
What is sin 64°?
Answer
sin 64° ≈
0.8988
Angle in radians: 64° = 16π/45. The point of the angle is in quadrant I, where sine is positive.
≈ — rounded to 4 decimal places. sin 64° can't be written with square roots: 64° is not a multiple of 3°.
P(cos 64°, sin 64°) ≈ (0.4384, 0.8988)
P(cos 64°, sin 64°) ≈ (0.4384, 0.8988)
Highlighted: the projection on the y-axis — sine, y ≈ 0.8988.
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
Sine of nearby angles
FAQ
What is sin 64°?
sin 64° ≈ 0.8988
Why does sin 64° 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°. 64° is not, so no such exact form exists; the value is used as a decimal: sin 64° ≈ 0.8988.
Why does a calculator show 0.9200 for sin 64?
The calculator is in radian mode (RAD): it takes sin 64 as the sine of 64 radians, sin 64 rad ≈ 0.9200. Switch it to degrees (DEG): sin 64° ≈ 0.8988. 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 54 Degrees: Sine of 54° on the Unit Circle
- Sin 55 Degrees: Sine of 55° on the Unit Circle
- Sin 56 Degrees: Sine of 56° on the Unit Circle
- Sin 57 Degrees: Sine of 57° on the Unit Circle
- Sin 58 Degrees: Sine of 58° on the Unit Circle
- Sin 59 Degrees: Sine of 59° on the Unit Circle
- Sin 60 Degrees: Sine of 60° on the Unit Circle
- Sin 61 Degrees: Sine of 61° on the Unit Circle
- Sin 62 Degrees: Sine of 62° on the Unit Circle
- Sin 63 Degrees: Sine of 63° on the Unit Circle
- Sin 65 Degrees: Sine of 65° on the Unit Circle
- Sin 66 Degrees: Sine of 66° on the Unit Circle
- Sin 67 Degrees: Sine of 67° on the Unit Circle
- Sin 68 Degrees: Sine of 68° on the Unit Circle
- Sin 69 Degrees: Sine of 69° on the Unit Circle
- Sin 70 Degrees: Sine of 70° on the Unit Circle
- Sin 71 Degrees: Sine of 71° on the Unit Circle
- Sin 72 Degrees: Sine of 72° on the Unit Circle
- Sin 73 Degrees: Sine of 73° on the Unit Circle
- Sin 74 Degrees: Sine of 74° on the Unit Circle
- Синус 64 градусов (sin 64°) на единичной окружности
- Seno de 64 grados (sen 64°) en el círculo unitario
- Seno de 64 graus (sen 64°) no ciclo trigonométrico