y' = (3-secx)'tanx -(3-secx)(tanx)'/(tanx)^2
= -secx(tanx)^2 - (3-secx)secx/(tanx)^2
= -secx[(tanx)^2 + (3-secx)]/tan^2x
=-[(tan)^2 +3 -secx]/sinx
find the derivative of
y= 3-secx/tanx
2 answers
Y=-cosxln(secx+tanx)