Sin 28 Degrees
Sin, Cos, Tan, Cot of an Angle
What is sin 28°?
Answer
sin 28° ≈
0.4695
Angle in radians: 28° = 7π/45. The point of the angle is in quadrant I, where sine is positive.
≈ — rounded to 4 decimal places. sin 28° can't be written with square roots: 28° is not a multiple of 3°.
P(cos 28°, sin 28°) ≈ (0.8829, 0.4695)
P(cos 28°, sin 28°) ≈ (0.8829, 0.4695)
Highlighted: the projection on the y-axis — sine, y ≈ 0.4695.
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 28°?
sin 28° ≈ 0.4695
Why does sin 28° 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°. 28° is not, so no such exact form exists; the value is used as a decimal: sin 28° ≈ 0.4695.
Why does a calculator show 0.2709 for sin 28?
The calculator is in radian mode (RAD): it takes sin 28 as the sine of 28 radians, sin 28 rad ≈ 0.2709. Switch it to degrees (DEG): sin 28° ≈ 0.4695. 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 18 Degrees: Sine of 18° on the Unit Circle
- Sin 19 Degrees: Sine of 19° on the Unit Circle
- Sin 20 Degrees: Sine of 20° on the Unit Circle
- Sin 21 Degrees: Sine of 21° on the Unit Circle
- Sin 22 Degrees: Sine of 22° on the Unit Circle
- Sin 23 Degrees: Sine of 23° on the Unit Circle
- Sin 24 Degrees: Sine of 24° on the Unit Circle
- Sin 25 Degrees: Sine of 25° on the Unit Circle
- Sin 26 Degrees: Sine of 26° on the Unit Circle
- Sin 27 Degrees: Sine of 27° on the Unit Circle
- Sin 29 Degrees: Sine of 29° on the Unit Circle
- Sin 30 Degrees: Sine of 30° on the Unit Circle
- Sin 31 Degrees: Sine of 31° on the Unit Circle
- Sin 32 Degrees: Sine of 32° on the Unit Circle
- Sin 33 Degrees: Sine of 33° on the Unit Circle
- Sin 34 Degrees: Sine of 34° on the Unit Circle
- Sin 35 Degrees: Sine of 35° on the Unit Circle
- Sin 36 Degrees: Sine of 36° on the Unit Circle
- Sin 37 Degrees: Sine of 37° on the Unit Circle
- Sin 38 Degrees: Sine of 38° on the Unit Circle
- Синус 28 градусов (sin 28°) на единичной окружности
- Seno de 28 grados (sen 28°) en el círculo unitario
- Seno de 28 graus (sen 28°) no ciclo trigonométrico