Precalculus Examples

$\frac{lim_{x \to 0} x - \tan (x)}{x^{3}}$

Step 1

Split the limit using the Sum of Limits Rule on the limit as $x$ approaches $0$ .

$\frac{lim_{x \to 0} x - lim_{x \to 0} \tan (x)}{x^{3}}$

Step 2

Move the limit inside the trig function because tangent is continuous.

$\frac{lim_{x \to 0} x - \tan (lim_{x \to 0} x)}{x^{3}}$

Step 3

Evaluate the limits by plugging in $0$ for all occurrences of $x$ .

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Step 3.1

Evaluate the limit of $x$ by plugging in $0$ for $x$ .

$\frac{0 - \tan (lim_{x \to 0} x)}{x^{3}}$

Step 3.2

Evaluate the limit of $x$ by plugging in $0$ for $x$ .

$\frac{0 - \tan (0)}{x^{3}}$

Step 4

Simplify the answer.

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Step 4.1

Simplify the numerator.

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Step 4.1.1

The exact value of $\tan (0)$ is $0$ .

$\frac{0 - 0}{x^{3}}$

Step 4.1.2

Multiply $- 1$ by $0$ .

$\frac{0 + 0}{x^{3}}$

Step 4.1.3

Add $0$ and $0$ .

$\frac{0}{x^{3}}$

Step 4.2

Divide $0$ by $x^{3}$ .

$0$