C-09-Q169mediumsingle_mcqsin60∘⋅cos30∘+cos60∘⋅sin30∘=?\sin 60^\circ \cdot \cos 30^\circ + \cos 60^\circ \cdot \sin 30^\circ = ?sin60∘⋅cos30∘+cos60∘⋅sin30∘=?a000b111c12\dfrac{1}{2}21d32\dfrac{\sqrt{3}}{2}23ব্যাখ্যাThis is the expansion of sin(60∘+30∘)=sin90∘\sin(60^\circ+30^\circ)=\sin 90^\circsin(60∘+30∘)=sin90∘. Since sin90∘=1\sin 90^\circ=1sin90∘=1, the expression equals 111.