C-10-Q040mediumsingle_mcqsin30∘=?\sin 30^\circ = ?sin30∘=?a111b12\dfrac{1}{2}21c32\dfrac{\sqrt{3}}{2}23d12\dfrac{1}{\sqrt{2}}21ব্যাখ্যাsin30∘=12\sin 30^\circ = \dfrac{1}{2}sin30∘=21 is a standard angle value, equal to the ratio of the opposite side to the hypotenuse in a 30∘30^\circ–– triangle.