isi-entrance 2016 Q20

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