This video lecture from Trigonometric Identities (F.Sc. first year Mathematics) covers: Question numbers 1-2 of exercise 10.2. In these questions we prove the given trigonometric equations and find the values of given trigonometric functions. 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.