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Q:

यदि  tan α = 2, है तो $$ {cosec^2 α - sec^2 α}\over{cosec^2 α + sec^2 α}   $$ का मान होगा ?

  • 1
    $$ -{15\over 9} $$
  • 2
    $$ {3\over 5} $$
  • 3
    $$ -{3\over 5} $$
  • 4
    $$ {17\over 5} $$
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Answer : 3. "$$ -{3\over 5} $$"

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