New js modules documentation added (#3736)

* New js modules documentation added
* Documentation: Spelling and formatting

Co-authored-by: ElectronicsInFocus <rnadyrshin@gmail.com>
Co-authored-by: あく <alleteam@gmail.com>

documentation/js/js_math.md

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+# js_math {#js_math}
+
+# Math module
+```js
+let math = require("math");
+```
+# Constants
+
+## PI
+The number π = 3.14159265358979323846264338327950288.
+
+## E
+The number e (Euler's number) = 2.71828182845904523536028747135266250.
+
+## EPSILON
+The smallest number that satisfies the condition: 1.0 + EPSILON != 1.0.
+EPSILON = 2.2204460492503131e-16.
+
+# Methods
+
+## abs
+Return the absolute value of a number.
+
+### Parameters
+- x: A number
+
+### Returns
+The absolute value of `x`. If `x` is negative (including -0), returns `-x`. Otherwise, returns `x`. The result is therefore always a positive number or 0.
+
+### Example
+```js
+math.abs(-5); // 5
+```
+
+## acos
+Return the inverse cosine (in radians) of a number.
+
+### Parameters
+- x: A number between -1 and 1, inclusive, representing the angle's cosine value
+
+### Returns
+The inverse cosine (angle in radians between 0 and π, inclusive) of `x`. If `x` is less than -1 or greater than 1, returns `NaN`.
+
+### Example
+```js
+math.acos(-1); // 3.141592653589793
+```
+
+## acosh
+Return the inverse hyperbolic cosine of a number.
+
+### Parameters
+- x: A number greater than or equal to 1
+
+### Returns
+The inverse hyperbolic cosine of `x`.
+
+### Example
+```js
+math.acosh(1); // 0
+```
+
+## asin
+Return the inverse sine (in radians) of a number.
+
+### Parameters
+- x: A number between -1 and 1, inclusive, representing the angle's sine value
+
+### Returns
+The inverse sine (angle in radians between -𝜋/2 and 𝜋/2, inclusive) of `x`.
+
+### Example
+```js
+math.asin(0.5); // 0.5235987755982989
+```
+
+## asinh
+Return the inverse hyperbolic sine of a number.
+
+### Parameters
+- x: A number
+
+### Returns
+The inverse hyperbolic sine of `x`.
+
+### Example
+```js
+math.asinh(1); // 0.881373587019543
+```
+
+## atan
+Return the inverse tangent (in radians) of a number.
+
+### Parameters
+- x: A number
+
+### Returns
+The inverse tangent (angle in radians between -𝜋/2 and 𝜋/2, inclusive) of `x`.
+
+### Example
+```js
+math.atan(1); // 0.7853981633974483
+```
+
+## atan2
+Return the angle in the plane (in radians) between the positive x-axis and the ray from (0, 0) to the point (x, y), for math.atan2(y, x).
+
+### Parameters
+- y: The y coordinate of the point
+- x: The x coordinate of the point
+
+### Returns
+The angle in radians (between -π and π, inclusive) between the positive x-axis and the ray from (0, 0) to the point (x, y).
+
+### Example
+```js
+math.atan2(90, 15); // 1.4056476493802699
+```
+
+## atanh
+The method returns the inverse hyperbolic tangent of a number.
+
+### Parameters
+- x: A number between -1 and 1, inclusive
+
+### Returns
+The inverse hyperbolic tangent of `x`.
+
+### Example
+```js
+math.atanh(0.5); // 0.5493061443340548
+```
+
+## cbrt
+Return the cube root of a number.
+
+### Parameters
+- x: A number
+
+### Returns
+The cube root of `x`.
+
+### Example
+```js
+math.cbrt(2); // 1.2599210498948732
+```
+
+## ceil
+Round up and return the smallest integer greater than or equal to a given number.
+
+### Parameters
+- x: A number
+
+### Returns
+The smallest integer greater than or equal to `x`. It's the same value as `-math.floor(-x)`.
+
+### Example
+```js
+math.ceil(-7.004); // -7
+math.ceil(7.004);  // 8
+```
+
+## clz32
+Return the number of leading zero bits in the 32-bit binary representation of a number.
+
+### Parameters
+- x: A number
+
+### Returns
+The number of leading zero bits in the 32-bit binary representation of `x`.
+
+### Example
+```js
+math.clz32(1);    // 31
+math.clz32(1000); // 22
+```
+
+## cos
+Return the cosine of a number in radians.
+
+### Parameters
+- x: A number representing an angle in radians
+
+### Returns
+The cosine of `x`, between -1 and 1, inclusive.
+
+### Example
+```js
+math.cos(math.PI); // -1
+```
+
+## exp
+Return e raised to the power of a number.
+
+### Parameters
+- x: A number
+
+### Returns
+A nonnegative number representing `e^x`, where `e` is the base of the natural logarithm.
+
+### Example
+```js
+math.exp(0); // 1
+math.exp(1); // 2.718281828459045
+```
+
+## floor
+Round down and return the largest integer less than or equal to a given number.
+
+### Parameters
+- x: A number
+
+### Returns
+The largest integer smaller than or equal to `x`. It's the same value as `-math.ceil(-x)`.
+
+### Example
+```js
+math.floor(-45.95); // -46
+math.floor(-45.05); // -46
+math.floor(-0); // -0
+math.floor(0); // 0
+math.floor(45.05); // 45
+math.floor(45.95); // 45
+```
+
+## is_equal
+Return true if the difference between numbers `a` and `b` is less than the specified parameter `e`.
+
+### Parameters
+- a: A number a
+- b: A number b
+- e: An epsilon parameter
+
+### Returns
+True if the difference between numbers `a` and `b` is less than the specified parameter `e`. Otherwise, false.
+
+### Example
+```js
+math.is_equal(1.4, 1.6, 0.2);      // false
+math.is_equal(3.556, 3.555, 0.01); // true
+```
+
+## max
+Return the largest of two numbers given as input parameters.
+
+### Parameters
+- a: A number a
+- b: A number b
+
+### Returns
+The largest of the given numbers.
+
+### Example
+```js
+math.max(10, 20);   // 20
+math.max(-10, -20); // -10
+```
+
+## min
+Return the smallest of two numbers given as input parameters.
+
+### Parameters
+- a: A number a
+- b: A number b
+
+### Returns
+The smallest of the given numbers.
+
+### Example
+```js
+math.min(10, 20);   // 10
+math.min(-10, -20); // -20
+```
+
+## pow
+Return the value of a base raised to a power.
+
+### Parameters
+- base: The base number
+- exponent: The exponent number
+
+### Returns
+A number representing base taken to the power of exponent.
+
+### Example
+```js
+math.pow(7, 2);  // 49
+math.pow(7, 3);  // 343
+math.pow(2, 10); // 1024
+```
+
+## random
+Return a floating-point, pseudo-random number that's greater than or equal to 0 and less than 1, with approximately uniform distribution over that range - which you can then scale to your desired range.
+
+### Returns
+A floating-point, pseudo-random number between 0 (inclusive) and 1 (exclusive).
+
+### Example
+```js
+let num = math.random();
+```
+
+## sign
+Return 1 or -1, indicating the sign of the number passed as argument.
+
+### Parameters
+- x: A number
+
+### Returns
+-1 if the number is less than 0, and 1 otherwise.
+
+### Example
+```js
+math.sign(3);  // 1
+math.sign(0);  // 1
+math.sign(-3); // -1
+```
+
+## sin
+Return the sine of a number in radians.
+
+### Parameters
+- x: A number representing an angle in radians
+
+### Returns
+The sine of `x`, between -1 and 1, inclusive.
+
+### Example
+```js
+math.sin(math.PI / 2); // 1
+```
+
+## sqrt
+Return the square root of a number.
+
+### Parameters
+- x: A number greater than or equal to 0
+
+### Returns
+The square root of `x`, a nonnegative number. If `x` < 0, script will fail with an error.
+
+### Example
+```js
+math.sqrt(25); // 5
+```
+
+## trunc
+Return the integer part of a number by removing any fractional digits.
+
+### Parameters
+- x: A number
+
+### Returns
+The integer part of `x`.
+
+### Example
+```js
+math.trunc(-1.123); // -1
+math.trunc(0.123);  // 0
+math.trunc(13.37);  // 13
+math.trunc(42.84);  // 42
+```