JS Built-ins
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Mathacosintermediate

Math.acos(-1) Equals PI

πŸ“– Usage Example
// Inverse cosine β€” result in radians
Math.acos(1)   // β†’ 0
Math.acos(0)   // β†’ 1.5707... (Ο€/2)

Use Math.acos() to find the angle (in radians) whose cosine equals a given value.

Math.acos(x)

Math.acos(-1) returns Math.PI (approximately 3.1416 radians).

Challenge: Verify that Math.acos(-1) equals Ο€.

πŸ’‘ Hints (2)
  • β€’ cos(Ο€) = -1, so acos(-1) = Ο€
  • β€’ This is a common way to get Ο€ in JavaScript