Math Chapter Wise question with answer

Q01 lf cos A cosB cosC a b c =, then triangle ABC is– English · JDD-75-PGT TIER II-X-15 28.06.2015 Q02 If in a triangle ABC, cosA+2cosB+cosC = 2, then a, b, c are in English · PGT 2005 Q03 If in triangle ABC 2cosA cosB 2cosC a b + + = + a b c bc ca then the value of Angle A will be: English · TGT 2011 Q04 In triangle ADC, the value of (b+c)cosA+(c+a) cosB+ (a+b) cosC English · TGT 2011 Q05 If 2 2 2 A B (cosA cosB) (sinA sinB) sin, 2 then what is the value of λ? English · OAVS TGT 2021 Q06 Let S be the sum of the first 10 terms of the series. tan–1 1 1 1 1 1 tan tan..... 3 7 13 − − + + + then, tan(S) is... English · EMRS PGT-2023