how to derivative tan and sec in hp prime

[zzhhdsf]

how to derivative tan and sec in hp prime, when I derivative tan it will give me something like: tan(x)^2+1, i know it's right, but i want an answer like sec(x)^2,also there is problem with derivative sec(x)

[Han]

(03-31-2017 06:32 PM)zzhhdsf Wrote:  how to derivative tan and sec in hp prime, when I derivative tan it will give me something like: tan(x)^2+1, i know it's right, but i want an answer like sec(x)^2,also there is problem with derivative sec(x)

What is the problem you are having with the derivative of sec(x)?