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NDA2014MathematicsTrigonometric Ratios & IdentitiesActual

What is ^2 66 1 2 ^ - ^2 23 1 2 ^ equal to?

Options

  1. A47^
  2. B47^
  3. C2 47^
  4. D2 47^

Correct answer

B. 47^

Step-by-step solution

90^ (43^ )= (90^ -47^ )= 47^

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