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AP EAMCET202125 Aug 2021Morning ShiftMathematicsTrigonometric Ratios & IdentitiesActual

In a A B C , suppose none on the angles are multiples of 2 , then what is the value A B+ B C+ A C ?

Options

  1. A1
  2. B-1
  3. C0

Correct answer

B. -1

Step-by-step solution

aligned & Given, A+B+C= and A, B, C n 2 & (B+C)= B C-1 B+ C & ( -A)= B C-1 B+ C & - A( B+ C)= B C-1 & A B+ B C+ C A=1 aligned

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