### Evaluate

**SOLUTION:**

Direct substitution of gives the indeterminate form . Therefore, we should apply trigonometric identities.

We know the pythagorean identity, . So,

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# Limit of a Function in Indeterminate Form| Differential and Integral Calculus| Feliciano and Uy| Exercise 1.3, Problem 18|

### Evaluate

**SOLUTION:**

Direct substitution of gives the indeterminate form . Therefore, we should apply trigonometric identities.

We know the pythagorean identity, . So,