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Q:

If $$ {tan\ θ={a\over b}}$$ then $$ {a\sinθ+b\cosθ\over{a\sinθ-b\cosθ}}$$  is

  • 1
    $$ {a\over {a^{2}+b^{2}}}$$
  • 2
    $$ {b\over {a^{2}+b^{2}}}$$
  • 3
    $$ {a^{2}-b^{2}\over {a^{2}+b^{2}}}$$
  • 4
    $$ {a^{2}+b^{2}\over {a^{2}-b^{2}}}$$
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Answer : 4. "$$ {a^{2}+b^{2}\over {a^{2}-b^{2}}}$$"

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