1.

If \[{{\sin }^{2}}\theta -2\cos \theta +\frac{1}{4}=0,\]then the general value of \[\theta \]is [MP PET 1984]

A. \[n\pi \pm \frac{\pi }{3}\]
B. \[2n\pi \pm \frac{\pi }{3}\]
C. \[2n\pi \pm \frac{\pi }{6}\]
D. \[n\pi \pm \frac{\pi }{6}\]
Answer» C. \[2n\pi \pm \frac{\pi }{6}\]


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