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      Question

      The minimum value of 9 cos2 θ + 36

      sec2 θ is 
      A 12 Correct Answer Incorrect Answer
      B 16 Correct Answer Incorrect Answer
      C 44 Correct Answer Incorrect Answer
      D 36 Correct Answer Incorrect Answer

      Solution

      The minimum value of a x + (b/x) is = 2 So the minimum value of  9 cos 2 θ + 36 sec 2 θ  = 2 = 2 = 2 18 =36

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