Trigonometric Methods (in Radians)
These methods handle trigonometric calculations, using radians for angles.
sin(x)
Returns the sine of x (radians).
Example:
console.log(Math.sin(Math.PI / 2)); // 1
cos(x)
Returns the cosine of x (radians).
Example:
console.log(Math.cos(0)); // 1
tan(x)
Returns the tangent of x (radians).
Example:
console.log(Math.tan(Math.PI / 4)); // 1
asin(x)
Returns the arcsine of x, in range [-π/2, π/2].
Example:
console.log(Math.asin(1)); // 1.5707963267948966
acos(x)
Returns the arccosine of x, in range [0, π].
Example:
console.log(Math.acos(0)); // 1.5707963267948966
atan(x)
Returns the arctangent of x, in range [-π/2, π/2].
Example:
console.log(Math.atan(1)); // 0.7853981633974483
atan2(y, x)
Returns the angle between the x-axis and point (x, y), in range [-π, π].
Example:
console.log(Math.atan2(1, 1)); // 0.7853981633974483
Example usage (animation positioning):
let angle = Math.PI / 4; // 45 degrees
console.log(Math.sin(angle), Math.cos(angle));
// 0.7071067811865475, 0.7071067811865475