$E_1: a+b+c=0$,if $1$ is a root of $ax^2+bx+c=0$. $E_2: b^2-a^2=2ac$,if $\sin \theta, \cos \theta$ are the roots of $ax^2+bx+c=0$. Which of the following is true?

  • A
    $E_1$ is true,$E_2$ is true
  • B
    $E_1$ is true,$E_2$ is false
  • C
    $E_1$ is false,$E_2$ is true
  • D
    $E_1$ is false,$E_2$ is false

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