This video lecture from Fundamentals of Trigonometry (F.Sc. first year Mathematics) covers: Question numbers 1-3 of exercise 9.2. In these questions we find the signs of given trigonometric functions, and find that in which quadrant the terminal arms of the given angles lie. 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.