isi-entrance 2013 Q20

isi-entrance · India 4 marks Harmonic Form
In the triangle $ABC$, the angle $\angle BAC$ is a root of the equation $$\sqrt { 3 } \cos x + \sin x = 1 / 2$$ Then the triangle $ABC$ is
(A) obtuse angled
(B) right angled
(C) acute angled but not equilateral
(D) equilateral
In the triangle $ABC$, the angle $\angle BAC$ is a root of the equation
$$\sqrt { 3 } \cos x + \sin x = 1 / 2$$
Then the triangle $ABC$ is\\
(A) obtuse angled\\
(B) right angled\\
(C) acute angled but not equilateral\\
(D) equilateral