lenacodiened lenacodiened
  • 01-05-2017
  • Mathematics
contestada

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

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Ellsonic
Ellsonic Ellsonic
  • 01-05-2017
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. 

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