300°
240°
120°
60°
Correct answer is A
In order to do this, simply find the option in the range where only the cos is +ve. This occurs in the range 270° \leq x \leq 360°.
Check: \sin 300 = - \sin 60 = \frac{-\sqrt{3}}{2}
\cos 300 = \cos 60 = \frac{1}{2}
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