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**Posts by Joel**

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**Joel**- Replies: 10

Can anyone help me, how to derive the formula of the volume of the cone 1/3*pi*r^2*h ?

Let A={ a,b,c,d......x,y,z}

Let B={ a,e,i,o,u}

Characteristic function is defined as

I(x) = { 1, if x belongs to B,

= { 0, if x doesnot belong to B. where x is a variable, which can take any letter from the alphabets.

For ex:

If the letter is 'a', then the value is 0.

If the letter is 'e', then the value is 1.

I have given what i know. If u find any mistake, pls correct me.

**Joel**- Replies: 3

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