# Why is #1-cos^3x=(1-cosx)(1-2cosx+cos^2x)# a conditional equation?

##### 1 Answer

Jan 1, 2018

Any equation that is true for some values of a variable and not true for other values is a conditional equation

#### Explanation:

For this equation

This equation is valid and true only for values of x that satisfy this equation. So this is a conditional equation.