This video lecture from Inverse Trigonometric Functions (F.Sc. first year Mathematics) covers: Question numbers 8-20 of exercise 13.2. In these questions we prove the given equations of inverse trigonometric functions using their addition and subtraction formulas. 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.