1.)
2.)
now i know that this is actually .
3.)
(1)
special angles , it is positive so x = 30 , 210
(2)
11.54 is the basic angle , X should be in the first and second quadrant as it is positive .
(3)
sin x -1 = 2 cos x - 2 sinx cos x
sin x-1 = 2 cos x ( 1 - sinx )
1 - sinx = - 2 cosX(1-sin x)
1 = -2cos X
cos X = - 1/2
X = 120 and 240
(3)