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Which expression is equivalent to (1 – sin2 x)(sec x)?
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Which expression is equivalent to (1 – sin2 x)(sec x)?

User Olawale
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1 Answer

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sin(2x) = 2sin(x)cos(x) so

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

because sec(x)cos(x) = 1.

User Shortstuffsushi
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