Sin 90 Degrees
Sin, Cos, Tan, Cot of an Angle
What is sin 90°?
Answer
sin 90° =
1
Angle in radians: 90° = π/2. The point of the angle is on the y-axis: (0, 1).
P(cos 90°, sin 90°) = (0, 1)
P(cos 90°, sin 90°) = (0, 1)
Highlighted: the projection on the y-axis — sine, y = 1.
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 90°?
sin 90° = 1
Why is sin 90° equal to 1?
The point of 90° on the unit circle is (0, 1), and sine is its the y-coordinate, so sin 90° = 1.
Why does a calculator show 0.8940 for sin 90?
The calculator is in radian mode (RAD): it takes sin 90 as the sine of 90 radians, sin 90 rad ≈ 0.8940. Switch it to degrees (DEG): sin 90° = 1. 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 80 Degrees: Sine of 80° on the Unit Circle
- Sin 81 Degrees: Sine of 81° on the Unit Circle
- Sin 82 Degrees: Sine of 82° on the Unit Circle
- Sin 83 Degrees: Sine of 83° on the Unit Circle
- Sin 84 Degrees: Sine of 84° on the Unit Circle
- Sin 85 Degrees: Sine of 85° on the Unit Circle
- Sin 86 Degrees: Sine of 86° on the Unit Circle
- Sin 87 Degrees: Sine of 87° on the Unit Circle
- Sin 88 Degrees: Sine of 88° on the Unit Circle
- Sin 89 Degrees: Sine of 89° on the Unit Circle
- Sin 97 Degrees: Sine of 97° on the Unit Circle
- Sin 98 Degrees: Sine of 98° on the Unit Circle
- Sin 100 Degrees: Sine of 100° on the Unit Circle
- Sin 101 Degrees: Sine of 101° on the Unit Circle
- Sin 105 Degrees: Sine of 105° on the Unit Circle
- Sin 106 Degrees: Sine of 106° on the Unit Circle
- Sin 108 Degrees: Sine of 108° on the Unit Circle
- Sin 110 Degrees: Sine of 110° on the Unit Circle
- Sin 120 Degrees: Sine of 120° on the Unit Circle
- Sin 125 Degrees: Sine of 125° on the Unit Circle
- Синус 90 градусов (sin 90°) на единичной окружности
- Seno de 90 grados (sen 90°) en el círculo unitario
- Seno de 90 graus (sen 90°) no ciclo trigonométrico