Question

what is meant by sigma
and why it is used?​

Answer 1

☞. REQUIRED ANSWER :- Sigma is the 18th letter of the Greek alphabet and is equivalent to our letter 'S'. In mathematics, the upper case sigma is used for the summation notation. The lower case sigma stands for standard deviation. ... Neither of them looks like our letter 'S', but they are both the Greek equivalent of it.

Sigma, Σ, is the standard notation for writing long sums.

HOPEFULLY IT HELPFUL YOU ☑️☑️☑️

Answer 2

$\huge \fbox \pink{answer}$

Sigma is the 18th letter of the Greek alphabet and is equivalent to our letter 'S'. In mathematics, the upper case sigma is used for the summation notation. The lower case sigma stands for standard deviation. ... Neither of them looks like our letter 'S', but they are both the Greek equivalent of it.