यदि $\int \frac{\sin ^2 \alpha-\sin ^2 x}{\cos x-\cos \alpha} d x=f(x)+A x+B$ और $B \in R$ है,तो

  • A
    $f(x)=2 \sin x, A=\cos \alpha$
  • B
    $f(x)=2 \sin x, A=2 \cos \alpha$
  • C
    $f(x)=\sin x, A=\cos \alpha$
  • D
    $f(x)=\sin x, A=2 \cos \alpha$

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