# How do you simplify #sec xcos (frac{\pi}{2} - x )#?

##### 1 Answer

Dec 15, 2014

The application of **co-functions** will make it easy to simplify this expression.

However, I am going to present how the ** co-function** is derived so you can have a better understanding as to why it came as such.

The **co-function** of

So how did this happen?

**Examine the following equation**

**Thus, applying this formula to #cos (pi/2) -x#**

**therefore,**

**Thus,**

**but,**

**then**