$ABC$ એક એવો ત્રિકોણ છે કે જેથી $\sin(2A + B) = \sin(C - A) = -\sin(B + 2C) = \frac{1}{2}$ થાય. જો $A, B,$ અને $C$ એ $A.P.$ માં હોય,તો $A, B,$ અને $C$ શું છે?

  • A
    $30^o, 60^o, 90^o$
  • B
    $45^o, 60^o, 75^o$
  • C
    $45^o, 45^o, 90^o$
  • D
    $60^o, 60^o, 60^o$

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