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Find \(y^{\prime \prime}\) for the following functions. $$y=\tan x$$

Short Answer

Expert verified
Answer: The second derivative of the function \(y = \tan x\) is \(y^{\prime \prime} = 2\sec^2x\tan x\).

Step by step solution

01

Find the first derivative, \(y^{\prime}\)

To find the first derivative of the function, \(y = \tan x\), we will use the following rule: $$(\tan x)^{\prime} = \sec^2x$$ So, the first derivative of the function y is: $$y^{\prime} = \sec^2x$$
02

Find the second derivative, \(y^{\prime \prime}\)

Now, we will find the second derivative of the function by finding the derivative of the first derivative, \(y^{\prime} = \sec^2x\), with respect to \(x\). To do this, we will use the chain rule, considering that: $$(\sec x)^{\prime} = \sec x \cdot \tan x$$ So, the second derivative of the function y is: $$y^{\prime \prime} = \frac{d}{dx}(\sec^2x) = 2\sec x \cdot \sec x \cdot \tan x = \boxed{2\sec^2x\tan x}$$

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