Q.2 Consider a triangle PQR having sides of lengths p,q and r opposite to the angles P,Q and R, respectively. Then which of the following statements is (are) TRUE ? p2 (A) cos P > 1- 2qr (B) cos R > () cos P + () cos Q \p+q. (C) < 2sin Q sin R sin P (D) If p < q and p < r, then cos Q > ² and cos R > º

Suppose that A and B are angles in standard position. Use the given information to find (a) sin (A + B), (b) sin (A − B), (c) tan (A + B), (d) tan (A − B), (e) the quadrant of A + B, and (f) the quadrant of A - B. cos A = 12 13 and sin B = 3 3π 5' 2