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May 18, 2013

# Homework Help: Maths

Posted by Belle on Thursday, April 29, 2010 at 11:37pm.

how do i find the derivative of y=2sin8(x+pi/4)-12??

• Maths - bobpursley, Thursday, April 29, 2010 at 11:41pm

let u= 8(x+PI/4)
then u'= 8

y'=-2cos u * u'

y'=-16cos(8(x+PI/4))

• Maths - Belle, Thursday, April 29, 2010 at 11:49pm

thank you so much I can see where I went wrong now.=D

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