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20 March, 16:58

1+sec^2xsin^2x=sec^2x

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Answers (2)
  1. 20 March, 17:59
    0
    1+sec^2 (x) sin^2 (x) = sec^2 (x)

    Then you final answer is 1=1
  2. 20 March, 18:57
    0
    1 + sec^2 (x) sin^2 (x) = sec^2 (x)

    This becomes

    1+tan^2 (x) = sec^2 (x) which is an identity

    You could

    1 + sin^2 (x) / cos^2 (x) = sec^2 (x)

    then

    cos^2 (x) + sin^2 (x) = cos^2 (x) sec^2 (x)

    1 = 1
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