C-09-Q148mediumsingle_mcq△ABC\triangle ABC△ABC এ ∠B=90∘, AB=8, BC=6\angle B=90^\circ,\;AB=8,\;BC=6∠B=90∘,AB=8,BC=6 হলে sinA=\sin A=sinA= ?a610\dfrac{6}{10}106b810\dfrac{8}{10}