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COMEDK2012MathematicsTrigonometric Ratios & Identities

10^ 20^ 30^ 40^ 50^ 60^ 70^ 80^ =

Options

  1. A0
  2. B-1
  3. C1 3
  4. D1

Correct answer

D. 1

Step-by-step solution

10^ 20^ 30^ 40^ 50 60^ 70^ 80^ = 10^ 20^ ( 1 3 ) 40^ (90^ -40^ )( 3 ) (90^ -20^ ) (90^ -10^ ) = 10^ 20^ 40^ 40^ 20^ 10^ =1

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