# calculus question!

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• June 3rd 2009, 07:56 PM
mzhang
calculus question!
I need full solutions on how to do 6 a and b, please help me! :) I don't know how to differentiate them.
• June 3rd 2009, 08:42 PM
Zocken
b. the derivative is $cosx+sinx$ so the slope is $cos(\frac{\pi}{2})+sin(\frac{\pi}{2})=0+1=1$ and the y coordinate is 1. so the equation is mx+b or $f(x)=(1)x+1=x+1$