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AP EAMCET202123 Aug 2021Morning ShiftMathematicsTrigonometric Ratios & IdentitiesActual

2 5 + 4 5 + 6 5 + 8 5 is equal to

Options

  1. A0
  2. B1
  3. C2 2
  4. D1 2

Correct answer

A. 0

Step-by-step solution

2 5 + 4 5 + 6 5 + 8 5 = ( 2 5 + 8 5 )+ ( 4 5 + 6 5 ) aligned & =2 ( 10 5 2 ) ( -6 5 2 )+2 ( 10 5 2 ) ( -2 5 2 ) & =2 (- 3 5 )+2 ( -2 10 )[ =0] & =0 aligned

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