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NDA2013MathematicsTrigonometric Ratios & IdentitiesActual

If A + B =90^ , then what is A B - A B equal to?

Options

  1. AA
  2. BA
  3. CA
  4. D0

Correct answer

B. A

Step-by-step solution

A cosec A - A A = 1- ^2 ~A = A

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