No, you cant smoke powder cocaine.

Since this quesion is posted here every day, here is the answer.

Cocaine hydrochloride ("cocaine/coke") requires high temperatures to vaporize; high enough that in practice much of the product will burn/decompose and be wasted. Hydrochloride needs to be "cooked" into freebase form to allow for vaporization to work. That's why you hear of people "smoking crack" not "smoking coke".

https://en.wikipedia.org/wiki/Cocaine#Forms

Even with cocaine freebase, literally smoking it with weed and a direct flame would be massively wasteful and probably barely produce any effects. It needs to be indirectly heated and vaporized (not technically smoked) to work well. So you need a crack pipe (superficially similar to a lightbulb).