Two forces $P + Q$ and $P -Q$ make angle $2 \alpha$ with each other and their  resultant make $\theta$ angle with bisector of angle between them. Then :

  • A

    $P\, tan\, \theta = Q\, tan \, \alpha$

  • B

    $P\, sin\, \theta = Q\, sin\, \alpha$

  • C

    $P\, cos\, \alpha = Q\, sin\, \theta$

  • D

    $P\, sin\, \alpha = Q\, sin\, \theta$

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