I can solve derivatives alright but I don't understand tangent lines at all.

Find the equation of the tangent line to the curve at the point . The equation of this tangent line can be written in the form

where m is?

And b is?

I solved the derivative down to

6[2sin(x)+sec(x)tan(x)]

I think this is right and hopefully you needed to solve the derivative.

Thanks to anyone who can help

Casas4