# What is the derivative of #(sinx+cosx)^2 +(sinx-cosx)^2#?

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The function is constant so the derivative is

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The derivative of ((\sin x + \cos x)^2 + (\sin x - \cos x)^2) is (4(\sin x \cos x + 1)).

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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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