Solve:
1) 2tan2x -1 = 0, 0 < x < 360 (degrees)
I got x = 13'17' and 103'17', but there are 4 answers (13'17', 103'17', 193'17', 283'17') . Can anyone explain why?
And also, why don't you double the quadrant ( 0 < 2x < 720)?
2) 2tanx + 3 = 0
Similar the q1, I only got two of the...