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Chapter 6: Q 128 (page 397)

Show that the period off(胃)=cot胃is蟺.

Short Answer

Expert verified

From the following graph of cotangent function f(胃)=cot胃it is clear that the period of cotangent function is 蟺.

Step by step solution

01

Step 1. Given Information

We have to prove that the period of cotangent function is 蟺.

We will draw the graph of this function. After that from the graph we will examine the period of the function.

02

Step 2. To find period of cotangent function    

The given function is :-

f(胃)=cot胃.

By using graphing utilities, we have the following graph of this function :-

We can see that curve of the graph repeated itself.

We know that the period of a function is where from the graph of function repeated itself.

We can see that the graph from 蟺2to 3蟺2is same as 3蟺2to 5蟺2,-蟺2to 蟺2and so on.

So we can conclude that the period of this function is :-

3蟺2-蟺2=蟺.

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