Answer:
Option C is right
Step-by-step explanation:
\(1+cos\theta =\frac{\sqrt{3}+2 }{2} =\frac{\sqrt{3} }{2} +1\)
Now we cancel 1 and get
\(cos\theta =\frac{\sqrt{3} }{2}\)
The solutions would be positive for cos hence the angle lies in I quadrant, IV quadrant.
In I quadrant angle satisfying in the I quadrant, is 30 degrees, pi/6
In IV quadrant this would be 2pi-pi/6 = 11pi/6
Hence solution is
pi/6, 11 pi/6
OPtionC
