Differentiate sin(x)cos(x)
let sin(x)=u , let cos(x)=v
du/dx = cos(x), dv/dx = -sin(x)
d[sin(x)cos(x)]/dx = v.du/dx + u.dv/dx
= cos^2(x) - sin^2(x)
let sin(x)=u , let cos(x)=v
du/dx = cos(x), dv/dx = -sin(x)
d[sin(x)cos(x)]/dx = v.du/dx + u.dv/dx
= cos^2(x) - sin^2(x)
