Question

differenciate d/dx (sinx^2)/(tanx^2)

Answer 1

By applying the u/v formula which states that..
d/dx(u/v) =v*du/dx+u*dv/dx
Where u and v are the functions of x

Hope it helps!

Answer 2

Make equations as per question, i.e.,
a+b=137 and a-b= 43 and solve both..to give,a=90 and b=47