Prove that sin(a) + sin(a+h) + sin(a+2h) +.........+ sin(a+(n-1)h) = (sin(nh/2) sin(a+(n-1)h/2)/sin(h/2) Share with your friends Share 11 Parthib Biswas answered this You can use mathematical induction to get it proved -8 View Full Answer Farhan answered this Plz give me answer 5 Sukrit Yadav answered this Prove that sin(a) + sin(a+h) + sin(a+2h) +.........+ sin(a+(n-1)h) = (sin(nh/2) sin(a+(n-1)h/2)/sin(h/2) -1 madan12 answered this Sina+sin(a+h) + .... +sin(a+(n-1)h) -1