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Mathematics 18 Online
OpenStudy (anonymous):

find an equation of the tangent line to the curve at y=cosx-sinx (pi, 1)

OpenStudy (anonymous):

Find the derivative of y=cosx-sinx: y'= -sinx-cosx then plug in pi for x and it will give you the slope (m). then apply the slope towards y-y1=m(x-x1)

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