Answer
$\dfrac{9\pi}{4},\dfrac{17\pi}{4}$
Work Step by Step
$\because \theta \text{ and } \theta + 2n \pi \text{ represent the same angle}$
$\text{Where } n \text{ is an integer}$
$\text{For } n=1, \text{ an equivalent positive angle to } \dfrac{\pi}{4} \text{ is:}$
$$\dfrac{\pi}{4}+2\pi = \dfrac{9\pi}{4}$$
$\text{For } n=2, \text{ an equivalent positive angle to } \dfrac{\pi}{4} \text{ is:}$
$$\dfrac{\pi}{4} +4\pi = \dfrac{17\pi}{4}$$
