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Q:

$$ sec{^4}A(1-sin{^4}A)-2tan{^2}A $$ का मान होगा:

  • 1
    $$ {1\over2}$$
  • 2
    0
  • 3
    2
  • 4
    1
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Answer : 4. "1"
Explanation :

 Put A=45 degree and we can get answer.

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