find dy/dx if y=tan(1-cos(x))
dy/dx=sec2(1-cos(x)). d(1-cosx)/dx
=sec2(1-cos(x)).(-sin(x))
= -sec2(1-cos(x)).sinx
formula used-
tan(x)= sec2x
cos(x)=-sin(x)
=sec2(1-cos(x)).(-sin(x))
= -sec2(1-cos(x)).sinx
formula used-
tan(x)= sec2x
cos(x)=-sin(x)