This video lecture from Fundamentals of Trigonometry (F.Sc. first year Mathematics) covers: Question numbers 8-12 of exercise 9.1. In these questions we are given with statements and we find one unknown by using formula (arc length = radius x circular angle). Find more e-learning material and educational video lectures in Urdu at maktab.pk. These videos are free to use for promotional and commercial purpose by keeping the credits to Maktab.