EXERCNEA 41 52 7 30. If in a AABC, Tan A+ Tan B+Tan C 6 and TanA TanB = 2 then the triangle is EXERO 413 Jr. MATHEMATICS 512 then tan y = cCos X 2 and cos(x-y)= cos y EXER 41 Sp 14)1 1) Right angled 2) Acute angled 1) 3+4 2) 3 +1 3) 3-4 4) 3-1 x tan A+y tan B 22. If 3) Obtuse angled 4) Equilateral angled 16 1 3 Tan x = 4 Tan y then hen cos A 31. If Sinx Cos y = 412 then x+y 23. If y cos B A+B Sin(x+ y) = A+B 2) tan 4)1 3 4) 16 1) cot- 3) 4) tan(A + B) 1) 16 3) cot (A+ B) 3t 1+ cos- 8. )3 3)4 1+cos 1+ cos 8. 24. If cos x = cos y and sin x = -siny, then 1+cos 32. sin 2008 x + sin 2008 y = 3) 0 hen 4)-2008 TC 4) cos 8. 2) 2008 1) 1 2) 3) 1) 1 25. (A): If A= 35, B= 15, C=40, then tanA tanB + tanB tanC + tanC tan A=1 3) 2 13)1 33. If A+B= and cosA+cos B =1 then (R): If A + B+ C=90, then E tan A tan B=1 Then which one of the following is true ? 1) A is true, R is true and R is correct explana- cos(A-B)= 2) 1. 2) To 3) 34. (1+ tan 1) (1 + tan 2) (1 + tan 3). (1+ tan 44) (1 + tan 45") = 2 then n = 3) 22 4) 23 ****** tion of A 2) A is true, R is true but R is not correct A-B). sin(4- GMT21 (R): sin(A + B).sin (A B) = sin* A sin B Then, which one of the following is true ? ARS explanation of A 1) 20 3) A is true, R is false 4) A is false, R is true V3 35 If a = cos A + cos B-cos (A + B) and A+B B b-4 sin sin- cos %3D 26. (A): sin 45 - sin 15 = then a-b%3D CATION3. 2. 1 4) 1) 1 2) 2 3) 2. 36. If 1+sin@=9cose and 0 < e