En
  • En
please help. find the derivative of z=1/2x+1/4 sin2x. i only got 1/2+1/2 cos2x but my book says cos^2x... pleaaseee
Mathematics
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En
  • En
please help. find the derivative of z=1/2x+1/4 sin2x. i only got 1/2+1/2 cos2x but my book says cos^2x... pleaaseee
Mathematics
chestercat
  • chestercat
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
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IrishBoy123
  • IrishBoy123
use the double angle identity \[cos2x = 2 cos^2 x - 1\]
En
  • En
is it really necessary to use the cos2x=2cos^2x-1? can i not use 1-2sin^2x which is also equals to cos2x?
En
  • En
@IrishBoy123 ? pleaaasseee

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IrishBoy123
  • IrishBoy123
of course you can, go for it see where each takes you, circle back if unsure:p

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