I can confirm the answer is not no solution it is also not pi/2, 3 pi over 2 and it also isn't pi/4, 3 pi over 4, 5 pi over 4, 7 pi over 4 please help​

I can confirm the answer is not no solution it is also not pi2 3 pi over 2 and it also isnt pi4 3 pi over 4 5 pi over 4 7 pi over 4 please help class=