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NDA2019MathematicsTrigonometric Ratios & IdentitiesActual

If 2 ~A -3 ~B -1 , then what is ( A - B ) equal to?

Options

  1. A1 5
  2. B1 6
  3. C1 7
  4. D1 9

Correct answer

C. 1 7

Step-by-step solution

aligned & Given : 2 A=1 & A= 1 2 and B= 1 3 & (A-B)= A- B 1+ A B & (A-B)= 1 2 - 1 3 1+ 1 2 1 3 = 1 6 7 6 = 1 7 aligned

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