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3 March, 16:28

Which expression is equivalent to (1-sin^2x) (sec x)

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  1. 3 March, 16:32
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    (1-sin²x) (sec x)

    (1-sin²x) = cos²x (since sin²x + cos²x = 1)

    (sec x) = 1/cosx

    (cos²x). (1/cosx) = = > (cos²x) / cosx) = = > = = = > cosx
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