Sin 125 Degrees
Sin, Cos, Tan, Cot of an Angle
What is sin 125°?
Answer
sin 125° ≈
0.8192
Angle in radians: 125° = 25π/36. The point of the angle is in quadrant II, where sine is positive.
≈ — rounded to 4 decimal places. sin 125° can't be written with square roots: 125° is not a multiple of 3°.
sin 125° = sin(180° − 55°) = sin 55° ≈ 0.8192
P(cos 125°, sin 125°) ≈ (−0.5736, 0.8192)
P(cos 125°, sin 125°) ≈ (−0.5736, 0.8192)
Highlighted: the projection on the y-axis — sine, y ≈ 0.8192.
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 125°?
sin 125° ≈ 0.8192
Why does sin 125° 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°. 125° is not, so no such exact form exists; the value is used as a decimal: sin 125° ≈ 0.8192.
Why does a calculator show −0.6160 for sin 125?
The calculator is in radian mode (RAD): it takes sin 125 as the sine of 125 radians, sin 125 rad ≈ −0.6160. Switch it to degrees (DEG): sin 125° ≈ 0.8192. 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 90 Degrees: Sine of 90° 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 126 Degrees: Sine of 126° on the Unit Circle
- Sin 127 Degrees: Sine of 127° on the Unit Circle
- Sin 130 Degrees: Sine of 130° on the Unit Circle
- Sin 134 Degrees: Sine of 134° on the Unit Circle
- Sin 135 Degrees: Sine of 135° on the Unit Circle
- Sin 140 Degrees: Sine of 140° on the Unit Circle
- Sin 142 Degrees: Sine of 142° on the Unit Circle
- Sin 144 Degrees: Sine of 144° on the Unit Circle
- Sin 145 Degrees: Sine of 145° on the Unit Circle
- Sin 150 Degrees: Sine of 150° on the Unit Circle
- Синус 125 градусов (sin 125°) на единичной окружности
- Seno de 125 grados (sen 125°) en el círculo unitario
- Seno de 125 graus (sen 125°) no ciclo trigonométrico