C-09-Q144mediumsingle_mcqtanA=13\tan A=\dfrac{1}{\sqrt{3}}tanA=31 ও sinB=12\sin B=\dfrac{1}{2}sinB=21 হলে A+B=A+B=A+B= ?a30∘30^\circ30∘b45∘45^\circ45∘c60