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CuriousTab

Simplification problems


  • 1. The radius of base of a right circular cone is 6cm and its slant height is 10cm. Then its volume is (use ?=227)

  • Options
  • A. 301.71 cm3
  • B. 310.71 cm3
  • C. 301.17 cm3
  • D. 310.17 cm3
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  • 2. If a2+b2+c2=14 and a+b+c=6 , then the value of ab+bc+ca is,

  • Options
  • A. 11
  • B. 12
  • C. 13
  • D. 14
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  • 3. If ab+ba=1, then the value of a3+b3 is

  • Options
  • A. 1
  • B. 0
  • C. -1
  • D. 2
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  • 4. A, B and C are three points on a circle with centre O. The tangent at C meets BA produced at T. If ?ATC = 30° and ?ACT = 48°,then what is the value of ?AOB ?

  • Options
  • A. 78°
  • B. 96°
  • C. 102°
  • D. 108°
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  • 5. If 3sin?+4cos?=5 (0

  • Options
  • A. 1/5
  • B. 2/5
  • C. 3/5
  • D. 4/5
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  • 6. If 11-13xx + 11-13yy + 11-13zz = 5 then what is the value of 1x + 1y + 1z = ?

  • Options
  • A. 1
  • B. 13/11
  • C. 13/5
  • D. 4
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  • 7. If 2x + (9/x) = 9, then what is the minimum value of x2+1x2 = ?

  • Options
  • A. 95/36
  • B. 97/36
  • C. 87/25
  • D. 623/27
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  • 8. If (5x ? y)/(5x + y) = 3/7, then what is the value of (4x2 + y2 ? 4xy)/(9x2 + 16y2 + 24xy) ?

  • Options
  • A. 0
  • B. 3/7
  • C. 18/49
  • D. 1/6
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  • 9. If (x + y)2 = xy + 1 and x3 ? y3 = 1 , then what is the value of x ? y?

  • Options
  • A. 1
  • B. 0
  • C. -1
  • D. 2
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  • 10. If sin ? + sin 5? = sin 3? and 0 < ? < (?/2), then what is the value of ? (in degrees)?

  • Options
  • A. 30
  • B. 45
  • C. 60
  • D. 75
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