Asked by Belle

how do i find the derivative of y=2sin8(x+pi/4)-12??
Answered by bobpursley
let u= 8(x+PI/4)
then u'= 8

y'=-2cos u * u'

y'=-16cos(8(x+PI/4))
Answered by Belle
thank you so much I can see where I went wrong now.=D
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