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MHT CET202020 Oct 2020Morning ShiftMathematicsTrigonometric Ratios & IdentitiesActual

If A , B , C , D are the angles of a cyclic quadrilateral taken in order, then A+ B+ Cos C+ Cos D=

Options

  1. A-1
  2. B1
  3. C1 2
  4. D0

Correct answer

D. 0

Step-by-step solution

Since the quadrilateral ABCD is cyclic, we have A + C =180^ and B + D =180^ A = (180^ - C )=- C B = (180^ - D ) =- D A + B + C + D =0

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