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NDA2013MathematicsTrigonometric Ratios & IdentitiesActual

What is 54^ 36^ + 20^ 70^ equal to?

Options

  1. A0
  2. B1
  3. C2
  4. D3

Correct answer

C. 2

Step-by-step solution

aligned & 54^ 36^ + 20^ 70^ & (90^ -54^ ) 36^ + 20^ (90^ -70^ ) & 36^ 36^ + 20^ 20^ =1+1=2 aligned

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