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Math Help - calculus question!

  1. #1
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    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.
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  2. #2
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    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
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