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NDA2015MathematicsTrigonometric Ratios & IdentitiesActual

What is 1- + 1- equal to?

Options

  1. A-
  2. B+
  3. C2
  4. D2

Correct answer

B. +

Step-by-step solution

aligned & 1- + 1- & = 1- + 1- & = ^2 - + ^2 - aligned aligned & = ^2 - - ^2 - & = ^2 - ^2 - = ( - )( + ) - aligned Option (B) is correct.

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