Sin 215 Degrees
Sin, Cos, Tan, Cot of an Angle
What is sin 215°?
Answer
sin 215° ≈
−0.5736
Angle in radians: 215° = 43π/36. The point of the angle is in quadrant III, where sine is negative.
≈ — rounded to 4 decimal places. sin 215° can't be written with square roots: 215° is not a multiple of 3°.
sin 215° = sin(180° + 35°) = −sin 35° ≈ −0.5736
P(cos 215°, sin 215°) ≈ (−0.8192, −0.5736)
P(cos 215°, sin 215°) ≈ (−0.8192, −0.5736)
Highlighted: the projection on the y-axis — sine, y ≈ −0.5736.
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 215°?
sin 215° ≈ −0.5736
Why does sin 215° 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°. 215° is not, so no such exact form exists; the value is used as a decimal: sin 215° ≈ −0.5736.
Why does a calculator show 0.9802 for sin 215?
The calculator is in radian mode (RAD): it takes sin 215 as the sine of 215 radians, sin 215 rad ≈ 0.9802. Switch it to degrees (DEG): sin 215° ≈ −0.5736. 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 165 Degrees: Sine of 165° on the Unit Circle
- Sin 167 Degrees: Sine of 167° on the Unit Circle
- Sin 175 Degrees: Sine of 175° on the Unit Circle
- Sin 179 Degrees: Sine of 179° on the Unit Circle
- Sin 180 Degrees: Sine of 180° on the Unit Circle
- Sin 195 Degrees: Sine of 195° on the Unit Circle
- Sin 198 Degrees: Sine of 198° on the Unit Circle
- Sin 200 Degrees: Sine of 200° on the Unit Circle
- Sin 210 Degrees: Sine of 210° on the Unit Circle
- Sin 211 Degrees: Sine of 211° on the Unit Circle
- Sin 216 Degrees: Sine of 216° on the Unit Circle
- Sin 225 Degrees: Sine of 225° on the Unit Circle
- Sin 227 Degrees: Sine of 227° on the Unit Circle
- Sin 234 Degrees: Sine of 234° on the Unit Circle
- Sin 240 Degrees: Sine of 240° on the Unit Circle
- Sin 252 Degrees: Sine of 252° on the Unit Circle
- Sin 255 Degrees: Sine of 255° on the Unit Circle
- Sin 270 Degrees: Sine of 270° on the Unit Circle
- Sin 285 Degrees: Sine of 285° on the Unit Circle
- Sin 288 Degrees: Sine of 288° on the Unit Circle
- Синус 215 градусов (sin 215°) на единичной окружности
- Seno de 215 grados (sen 215°) en el círculo unitario
- Seno de 215 graus (sen 215°) no ciclo trigonométrico