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MHT CET202415 May 2024Evening ShiftMathematicsTrigonometric EquationsActual

In a triangle ABC , with usual notations, B+ C b+c + A a has the value

Options

  1. A1 ~b + c
  2. B1 ~b
  3. C1 c
  4. D1 a

Correct answer

D. 1 a

Step-by-step solution

aligned & B+ C b+c + A a & = a B+a C+b A+c A a(b+c) & = (a B+b A)+(a C+c A) a(b+c) aligned aligned & = c+b a(b+c) & = 1 a aligned ...[By projection rule]

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