# Solutions to Problem Set 4

Math 211-03

9-11-2017

[Trig substitution]

1. Compute .

You don't need to do a trig substitution, since this is a standard inverse sine form.

However, you could do this using trig substitution, using .

2. Compute .

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3. Compute .

4. Compute .

5. Compute .

While you could do this using trig substitution, it's unnecessarily complicated. A simple substitution is better.

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