Calculus:
Integral: Trigonometric Substitution

1. 
\(\int \frac{1}{25+{x}^{2}} \, dx\)
 Solution
2. 
\(\int \frac{3}{\sqrt{{x}^{2}-25}} \, dx\)
 Solution
3. 
\(\int \frac{1}{\sqrt{25-{x}^{2}}} \, dx\)
 Solution