1. Numeric Functions Purpose:-
SIN returns the sine of n (an angle expressed in radians).
This function takes as an argument any numeric datatype or any nonnumeric datatype that can be implicitly converted to a numeric datatype. If the argument is BINARY_FLOAT, then the function returns BINARY_DOUBLE. Otherwise the function returns the same numeric datatype as the argument.
Examples The following example returns the sine of 30 degrees:
SELECT SIN(30 * /180) "Sine of 30 degrees" FROM DUAL;
Sine of 30 degrees .5

2. Examples:- The following example returns the cosine of 180 degrees:
Purpose:-
COS returns the cosine of n (an angle expressed in radians).
This function takes as an argument any numeric datatype or any nonnumeric datatype that can be implicitly converted to a numeric datatype. If the argument is BINARY_FLOAT, then the function returns BINARY_DOUBLE. Otherwise the function returns the same numeric datatype as the argument.
Examples:- The following example returns the cosine of 180 degrees:
SELECT COS(180 * /180) "Cosine of 180 degrees" FROM DUAL;
Cosine of 180 degrees

3. Floor:-
Purpose:-
This function takes as an argument any numeric datatype or any nonnumeric datatype that can be implicitly converted to a numeric datatype. The function returns the same datatype as the numeric datatype of the argument.
Examples:- The following example returns the largest integer equal to or less than 15.7:
SELECT FLOOR(15.7) "Floor" FROM DUAL;
Floor 15