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NDA2013MathematicsTrigonometric Ratios & IdentitiesActual

If cosec + =c , then what is equal to?

Options

  1. Ac c^2-1
  2. Bc c^2+1
  3. Cc^2-1 c^2+1
  4. DNone of these

Correct answer

C. c^2-1 c^2+1

Step-by-step solution

1+ =c 2 =c = 1- 1 c^2 1+ 1 c^2 = c^2-1 c^2+1

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