cos(A+C) > tan A, tan B, tan C are in 10. cos2B = cos(A- C) 3)...
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cos(A+C) > tan A, tan B, tan C are in 10. cos2B = cos(A- C) 3) G.P. 4) A.G.P 2) Н.Р 1) A.P. cos A x tan A+ y tan B then 11. If x+y cos B A-B A- B 2) tan A+B 3) cot- A+B 4) cot- 1) tan- 12. In a triangle ABC, cos A + cos B+ cosC 1) < 1 2) > 1 3) > lbut not > 2 4) >1 but not >3/2 13. Let 0<A, B< satisfying the equations 3sin2 A+2 sin' B=1 and 3 sin 2A-2 sin 2B 0 then 4+2 1) 0 2) t/2 3) t/6 4) 3t/2 14. xy+ yz+zx = 1, 1+x 1+y 1+z? 2 1) Ja+xX1-y(1-z?) 2) Ja-xX1+y° )(-z²) 2. 3) Ja+x*X1+y* X(+z²) 4) Ja-x)(1+y}91+z') 15. In a triangle ABC C 1 sin 2) sin 2 1) sin sin sin sin-< 8. 2 8. A 3) sin-sin С 1 C 1 B B sin i> 4) sin sin sin-2 2 8 28 16. In a AABC, sin A+ sin"B+sin C= 1 D-+2cos Acos Bcos C+cos 2A cos 2Bcos 2C 3 1 2) 2 cos Acos BcosC+cos 2A cos 2Bcos 2C 3) 2 cos Acos BcosC+ cos 2 Acos 2B 4) 2 cos A cos B cos C+ cos 2A cos 2B 17. If cos0(sin0+Vsin 0+sin o) Sk then the value of k is 1) Vi+ cos" a 2) Vi+ sin? 3) 2+ cos a 4) V2 + sin 18. If u =va cos 0+b sin 0+va sin 0+b cos" 0, then the difference between the maximum and minimum value so u is given by 1) 2(a +b) 2) 2va +b? 4) (a-b ELITE SERIES for Sri Chaitava 3) (a+b) cos(A+C) > tan A, tan B, tan C are in 10. cos2B = cos(A- C) 3) G.P. 4) A.G.P 2) Н.Р 1) A.P. cos A x tan A+ y tan B then 11. If x+y cos B A-B A- B 2) tan A+B 3) cot- A+B 4) cot- 1) tan- 12. In a triangle ABC, cos A + cos B+ cosC 1) < 1 2) > 1 3) > lbut not > 2 4) >1 but not >3/2 13. Let 0<A, B< satisfying the equations 3sin2 A+2 sin' B=1 and 3 sin 2A-2 sin 2B 0 then 4+2 1) 0 2) t/2 3) t/6 4) 3t/2 14. xy+ yz+zx = 1, 1+x 1+y 1+z? 2 1) Ja+xX1-y(1-z?) 2) Ja-xX1+y° )(-z²) 2. 3) Ja+x*X1+y* X(+z²) 4) Ja-x)(1+y}91+z') 15. In a triangle ABC C 1 sin 2) sin 2 1) sin sin sin sin-< 8. 2 8. A 3) sin-sin С 1 C 1 B B sin i> 4) sin sin sin-2 2 8 28 16. In a AABC, sin A+ sin"B+sin C= 1 D-+2cos Acos Bcos C+cos 2A cos 2Bcos 2C 3 1 2) 2 cos Acos BcosC+cos 2A cos 2Bcos 2C 3) 2 cos Acos BcosC+ cos 2 Acos 2B 4) 2 cos A cos B cos C+ cos 2A cos 2B 17. If cos0(sin0+Vsin 0+sin o) Sk then the value of k is 1) Vi+ cos" a 2) Vi+ sin? 3) 2+ cos a 4) V2 + sin 18. If u =va cos 0+b sin 0+va sin 0+b cos" 0, then the difference between the maximum and minimum value so u is given by 1) 2(a +b) 2) 2va +b? 4) (a-b ELITE SERIES for Sri Chaitava 3) (a+b)
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