Math Chapter Wise question with answer

Q01 In a ∆ ∆ ∆ABC, a = 1, b = 2 c = 3. Then cos 2 A is English · PGT 2009 Q02 Let ABC be any triangle, then a2 (cos 2B – cos 2C) + b2 (cos 2C – cos 2A) + c2 (cos2A – cos 2B) is equal to– English · GIC Lecturer Exam-2015 Q03 In ∆ ∆ ∆ABC, the value of (a – b)2 2 2 2 C C cos (a b) sin 2 2 + + + + is English · PGT 2009 Q04 For a cyclic quadrilateral ABCD, cosB+cosD is equal to– English · KVS TGT DEC 2017 Q05 In a right angle triangle ABC, right angled at C, the value of sin A cos B + cos A sin B is English · TGT 2004 Q06 In a ∆ ∆ ∆ABC, if a = 2, B = tan–1 1 2 and C = tan–1 1, 3 then (A, b) is equal to: English · EMRS PGT-2023