Answer
$\theta=k\pi+\frac{\pi}{4}$ (k is an integer),
$\theta=\frac{\pi}{4},\frac{5\pi}{4},\frac{9\pi}{4},\frac{13\pi}{4},\frac{17\pi}{4},\frac{21\pi}{4} $.
Work Step by Step
$tan\theta=1$,
$\theta=k\pi+\frac{\pi}{4}$ (k is an integer),
Six examples: $\theta=\frac{\pi}{4},\frac{5\pi}{4},\frac{9\pi}{4},\frac{13\pi}{4},\frac{17\pi}{4},\frac{21\pi}{4} $.
