※\( \tan \frac{\pi}{4} = 1 \), \( \sin \frac{\pi}{3} = \frac{\sqrt{3}}{2} \)
, \( \tan 0 = 0 \), \( \sin 0 = 0 \)
- (1) \( \displaystyle \int \dfrac{1}{\sqrt{x^2 + 9}} \, dx \)
- (2) \( \displaystyle \int \dfrac{5}{\sqrt{x + 2}\sqrt{x - 2}} \, dx \)
- (3) \( \displaystyle \int_{1}^{3} \dfrac{7}{\sqrt{x^2 - 1}} dx \)
- (4) \( \displaystyle \int_{0}^{\frac{\sqrt{3}}{2}} \dfrac{1}{\sqrt{1 - x^2}} \, dx \)
- (5) \( \displaystyle \int_{0}^{5} \dfrac{5}{x^2 + 25} \, dx \)