an = a+(n-1)d Where an=last term a=first term d=common difference n=number of term Note: last term is denoted by an or l Sn=n/2[2a+(n-1)d Sn=sum of all terms
For a right angled triangle, with one angle θ (which is not the right angle), the trigonometric ratios are defined as follows: sin θ = Perpendicular / Hypotenuse (corresponding to the angle...