Calculus Examples

$\frac{lim_{x \to 0} \sin (x)}{\tan (x)}$

Step 1

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

$\frac{\sin (lim_{x \to 0} x)}{\tan (x)}$

Step 2

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

$\frac{\sin (0)}{\tan (x)}$

Step 3

Simplify the answer.

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Step 3.1

Rewrite $\tan (x)$ in terms of sines and cosines.

$\frac{\sin (0)}{\frac{\sin (x)}{\cos (x)}}$

Step 3.2

Multiply by the reciprocal of the fraction to divide by $\frac{\sin (x)}{\cos (x)}$ .

$\sin (0) \frac{\cos (x)}{\sin (x)}$

Step 3.3

Write $\sin (0)$ as a fraction with denominator $1$ .

$\frac{\sin (0)}{1} \cdot \frac{\cos (x)}{\sin (x)}$

Step 3.4

Simplify.

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Step 3.4.1

Divide $\sin (0)$ by $1$ .

$\sin (0) \frac{\cos (x)}{\sin (x)}$

Step 3.4.2

Combine $\sin (0)$ and $\frac{\cos (x)}{\sin (x)}$ .

$\frac{\sin (0) \cos (x)}{\sin (x)}$

Step 3.5

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

$\frac{0 \cos (x)}{\sin (x)}$

Step 3.6

Multiply $0$ by $\cos (x)$ .

$\frac{0}{\sin (x)}$

Step 3.7

Divide $0$ by $\sin (x)$ .

$0$