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Math.js: Built-in Functions

JS Calc via Math.js provides a vast range of functions. Angles for trigonometric functions are in radians by default (you can use the deg unit for degrees, e.g., sin(45 deg)).

Trigonometric

  • sin(x), cos(x), tan(x)
  • asin(x), acos(x), atan(x), atan2(y, x)
  • sinh(x), cosh(x), tanh(x)
  • asinh(x), acosh(x), atanh(x)
  • Example: sin(pi/4), cos(30 deg)

  • Angles are expected in radians by default. You can directly use degree units:

    sin(30 deg) = 0.5

    cos(pi/4 rad) = 0.7071067811865476 // rad is often implicit for plain numbers

  • For more comprehensive information on unit handling, see the Units and Conversions page.

Exponential & Logarithmic

  • exp(x) (e^x)
  • log(x) (natural logarithm)
  • log10(x) (base-10 logarithm)
  • log2(x) (base-2 logarithm)
  • Example: log(e^3), log10(100)

Powers & Roots

  • pow(base, exp) (same as base^exp)
  • sqrt(x)
  • cbrt(x)
  • nthRoot(a [, root]) (root defaults to 2)
  • Example: sqrt(16), nthRoot(27, 3)

Rounding:

  • round(x [, n]) (round to n decimals)
  • ceil(x [, n])
  • floor(x [, n])
  • fix(x [, n]) (round towards zero)
  • Example: round(pi, 2), floor(3.8)

Statistical (often on arrays/matrices):

  • mean(A), median(A), std(A), variance(A)
  • min(A), max(A), sum(A), prod(A)
  • quantileSeq(A, probOrN)
  • Example: mean([1,2,3,7]), max(1, 5, 2)

Probability:

  • factorial(n) (or n!)
  • permutations(n [, k])
  • combinations(n, k)
  • gamma(n)
  • Example: 5!, combinations(5,2)

Other:

abs(x), sign(x), isNumeric(x), isInteger(x), isPrime(x) (for numbers), gcd(a,b), lcm(a,b) (for numbers).

For a complete list, refer to the official Math.js Functions Documentation.