Calculus Examples

$y = 3 \tan (π x^{2})$

Step 1

Since $3$ is constant with respect to $x$ , the derivative of $3 \tan (π x^{2})$ with respect to $x$ is $3 \frac{d}{d x} [\tan (π x^{2})]$ .

$3 \frac{d}{d x} [\tan (π x^{2})]$

Step 2

Differentiate using the chain rule, which states that $\frac{d}{d x} [f (g (x))]$ is $f' (g (x)) g' (x)$ where $f (x) = \tan (x)$ and $g (x) = π x^{2}$ .

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Step 2.1

To apply the Chain Rule, set $u$ as $π x^{2}$ .

$3 (\frac{d}{d u} [\tan (u)] \frac{d}{d x} [π x^{2}])$

Step 2.2

The derivative of $\tan (u)$ with respect to $u$ is $\sec^{2} (u)$ .

$3 (\sec^{2} (u) \frac{d}{d x} [π x^{2}])$

Step 2.3

Replace all occurrences of $u$ with $π x^{2}$ .

$3 (\sec^{2} (π x^{2}) \frac{d}{d x} [π x^{2}])$

Step 3

Differentiate.

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Step 3.1

Since $π$ is constant with respect to $x$ , the derivative of $π x^{2}$ with respect to $x$ is $π \frac{d}{d x} [x^{2}]$ .

$3 \sec^{2} (π x^{2}) (π \frac{d}{d x} [x^{2}])$

Step 3.2

Differentiate using the Power Rule which states that $\frac{d}{d x} [x^{n}]$ is $n x^{n - 1}$ where $n = 2$ .

$3 \sec^{2} (π x^{2}) (π (2 x))$

Step 3.3

Simplify the expression.

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Step 3.3.1

Move $2$ to the left of $π$ .

$3 \sec^{2} (π x^{2}) (2 \cdot π x)$

Step 3.3.2

Multiply $2$ by $3$ .

$6 \sec^{2} (π x^{2}) (π x)$

Step 3.3.3

Reorder the factors of $6 \sec^{2} (π x^{2}) (π x)$ .

$6 π x \sec^{2} (π x^{2})$