Find the equation of the normal to the curve y=1+sinx/cosx at x= pi/4.
if the given curve is ; i.e.
the slope of the tangent
at x= , ..........(2)
the slope of the normal at x= is
therefore the equation which passes through the point and having slope -1/2 is given as:
which is the required equation of the normal.
hope this helps you.