Cos 540 Degrees
Sin, Cos, Tan, Cot of an Angle
What is cos 540°?
Answer
cos 540° =
−1
Angle in radians: 540° = 3π. 540° = 360° + 180° — a full turn plus 180°: the point is on the x-axis, (−1, 0).
cos 540° = cos(540° − 360°) = cos 180°
P(cos 540°, sin 540°) = (−1, 0)
P(cos 540°, sin 540°) = (−1, 0)
Highlighted: the projection on the x-axis — cosine, x = −1.
+1 turn: the drawing shows 180°.
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
FAQ
What is cos 540°?
cos 540° = −1
Why is cos 540° equal to −1?
540° ends at the same point as 180°, (−1, 0), and cosine is its the x-coordinate, so cos 540° = −1.
Why does a calculator show 0.9380 for cos 540?
The calculator is in radian mode (RAD): it takes cos 540 as the cosine of 540 radians, cos 540 rad ≈ 0.9380. Switch it to degrees (DEG): cos 540° = −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
- Cos 324 Degrees: Cosine of 324° on the Unit Circle
- Cos 330 Degrees: Cosine of 330° on the Unit Circle
- Cos 341 Degrees: Cosine of 341° on the Unit Circle
- Cos 342 Degrees: Cosine of 342° on the Unit Circle
- Cos 345 Degrees: Cosine of 345° on the Unit Circle
- Cos 355 Degrees: Cosine of 355° on the Unit Circle
- Cos 360 Degrees: Cosine of 360° on the Unit Circle
- Cos 390 Degrees: Cosine of 390° on the Unit Circle
- Cos 400 Degrees: Cosine of 400° on the Unit Circle
- Cos 450 Degrees: Cosine of 450° on the Unit Circle
- Cos 570 Degrees: Cosine of 570° on the Unit Circle
- Cos 690 Degrees: Cosine of 690° on the Unit Circle
- Cos 720 Degrees: Cosine of 720° on the Unit Circle
- Cot 0 Degrees: Cotangent of 0° on the Unit Circle
- Cot 1 Degree: Cotangent of 1° on the Unit Circle
- Cot 2 Degrees: Cotangent of 2° on the Unit Circle
- Cot 3 Degrees: Cotangent of 3° on the Unit Circle
- Cot 4 Degrees: Cotangent of 4° on the Unit Circle
- Cot 5 Degrees: Cotangent of 5° on the Unit Circle
- Cot 6 Degrees: Cotangent of 6° on the Unit Circle
- Косинус 540 градусов (cos 540°) на единичной окружности
- Coseno de 540 grados (cos 540°) en el círculo unitario
- Cosseno de 540 graus (cos 540°) no ciclo trigonométrico