Math.sin(x) returns the sine (a value between -1 and 1) of the angle x (given in radians).
If you want to use degrees instead of radians, you have to convert degrees to radians:
Angle in radians = Angle in degrees x PI / 180.
Math.min() and Math.max()
Math.min() and Math.max() can be used to find the lowest or highest value in a list of arguments:
Unlike other global objects, the Math object has no constructor. Methods and properties are static.
All methods and properties (constants) can be used without creating a Math object first.
Math Object Methods
abs(x) Returns the absolute value of x
acos(x) Returns the arccosine of x, in radians
asin(x) Returns the arcsine of x, in radians
atan(x) Returns the between -PI/2 arctangent of x as a numeric value
and PI/2 radians
atan2(y, x) Returns the arctangent of the quotient of its arguments
ceil(x) Returns the value of x rounded up to its nearest integer
cos(x) Returns the cosine of x (x is in radians)
exp(x) Returns the value of Ex
floor(x) Returns the value of x rounded down to its nearest integer
log(x) Returns the natural logarithm (base E) of x
max(x, y, z, ..., n) Returns the number with the highest value
min(x, y, z, ..., n) Returns the number with the lowest value
pow(x, y) Returns the value of x to the power of y
random() Returns a random number between 0 and 1
round(x) Returns the value of x rounded to its nearest integer
sin(x) Returns the sine of x (x is in radians)
sqrt(x) Returns the square root of x
tan(x) Returns the tangent of an angle
Math.random() returns a random number between 0 (inclusive), and 1 (exclusive):
Math.random() always returns a number lower than 1.
Math.random() used with Math.floor() can be used to return random integers.
Very often, in programming, you will need a data type that can only have one of two values, like
YES / NO
ON / OFF
TRUE / FALSE
The Boolean() Function
You can use the Boolean() function to find out if an expression (or a variable) is true:
Comparisons and Conditions
The chapter JS Comparisons gives a full overview of comparison operators.
The chapter JS Conditions gives a full overview of conditional statements.
Booleans Can be Objects
var x = false;
But booleans can also be defined as objects with the keyword new:
var y = new Boolean(false);
Note:- Do not create Boolean objects. It slows down execution speed.