Question

f(x)=sin2x+tgx
f(x)=x2ctgx

Answer 1

f(x)=sin2x+tgx
f*(x)=1/2cos2x+(1/cos^2x)
f(x)=x2ctgx
f*(x)=x^2*(-1/sin^2x)+2x*ctgx= -x^2/sin^2x+2x*ctgx