is true for all 
if 
![\theta =\dfrac{\pi}{6}=30^{\circ}\ \ \text{[Accept]}\\ \\\theta =-\dfrac{\pi}{6}=-30^{\circ}\ \ \text{[Reject]}](/tpl/images/0463/4910/401be.png)
![\theta =\dfrac{\pi}{6}+\dfrac{\pi}{2}=30^{\circ}+90^{\circ}=120^{\circ}\ \ \text{[Accept]}\\ \\\theta =-\dfrac{\pi}{6}+\dfrac{\pi}{2}=-30^{\circ}+90^{\circ}=60^{\circ}\ \ \text{[Accept]}](/tpl/images/0463/4910/9e618.png)
![\theta =\dfrac{\pi}{6}+\pi=30^{\circ}+180^{\circ}=210^{\circ}\ \ \text{[Accept]}\\ \\\theta =-\dfrac{\pi}{6}+\pi=-30^{\circ}+180^{\circ}=150^{\circ}\ \ \text{[Accept]}](/tpl/images/0463/4910/d7a90.png)
![\theta =\dfrac{\pi}{6}+\dfrac{3\pi}{2}=30^{\circ}+270^{\circ}=300^{\circ}\ \ \text{[Accept]}\\ \\\theta =-\dfrac{\pi}{6}+\dfrac{3\pi}{2}=-30^{\circ}+270^{\circ}=240^{\circ}\ \ \text{[Accept]}](/tpl/images/0463/4910/61755.png)
![\theta =\dfrac{\pi}{6}+2\pi=30^{\circ}+360^{\circ}=390^{\circ}\ \ \text{[Reject]}\\ \\\theta =-\dfrac{\pi}{6}+2\pi=-30^{\circ}+360^{\circ}=330^{\circ}\ \ \text{[Accept]}](/tpl/images/0463/4910/169e2.png)
all angles 
Question 2)
15 points and will give out brainliest.
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