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

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

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For this equation

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

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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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