A function f(x) of the variable x, has a period k where k is some constant, if
f(x+ k) = f(x) for every x.
It is easy to show that f(x + nk) = f(x) for any integer n.
What the above two formulae imply is that the values of the function repeat after an interval (or period) of k. The trigonometric functions are some of the better known periodic functions.
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The mean is usually the arithmetic mean - there are other means in maths. For a set of numbers, the arithmetic mean is the sum of the numbers divided by the number of numbers.
A expression in maths is a collection of terms without an equality sign.
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circle
direction
Adding
The mean is usually the arithmetic mean - there are other means in maths. For a set of numbers, the arithmetic mean is the sum of the numbers divided by the number of numbers.
it mean have to divide it i think