please answer writing exam be geniune
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tan^2 theta - 1/cos^2 theta = -1
LHS:
=> sin^2 theta/ cos^2 theta - 1/cos^2 theta
=> sin^2 theta - 1/ cos^2 theta
=> -cos^2 theta / cos^2 theta [ sin^2 theta + cos ^2 theta = 1 ]
=> -1
RHS:
=> -1
LHS= RHS
Hence proved
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