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Manipal MET2012MathematicsTrigonometric Ratios & Identities

The value of 2 7 + 4 7 + 6 7 is

Options

  1. A1
  2. B-1
  3. C1 2
  4. D- 1 2

Correct answer

D. - 1 2

Step-by-step solution

2 7 + 4 7 + 6 7 gathered = 1 2 7 [2 7 2 7 +2 7 4 7 +2 7 6 7 ] gathered gathered = 1 2 7 [ 3 7 - 7 + 5 7 - 3 7 + - 5 7 ] =- 1 2 gathered

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