# What are factorials used for?

##### 1 Answer

Sep 6, 2015

Many things in various areas of mathematics.

#### Explanation:

Here are a few examples:

**Probability (Combinatorics)**

If a fair coin is tossed 10 times, what is the probability of exactly

Answer:

**Series for sin, cos and exponential functions**

**Taylor Series**

**Binomial Expansion**

where