# What is the derivative of this function #y=cos^-1(2x+1)#?

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The derivative of the function ( y = \cos^{-1}(2x + 1) ) is given by:

[ \frac{dy}{dx} = -\frac{1}{\sqrt{1 - (2x + 1)^2}} \times 2 ]

[ = -\frac{2}{\sqrt{1 - (2x + 1)^2}} ]

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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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