Is it normal to be angry at my trqnsgender friend?

Your friend isn't the problem; your feelings are. Luckily, your feelings are something you do have some control over.

Yes you are normal.
The problem is that you are having a hard time coping with it. That comes with the fact that you have likely been told about this and do not know how best to handle it.
There are stages of acceptance; the Kübler-Ross Model is one which springs to mind as it pertains to grief and acceptance towards dying.

I know this situation is different and there are different steps, but your situation is dealing with something that is difficult and in a way you are grieving your friend.

Step One is Denial
Step Two is Anger
Step Three is Bargaining
Step Four is Depression
Step Five is Acceptance.

And just because you might no longer be angry doesn't mean you will not repeat steps.
But it is important that you either find a way to wrap your mind around it and learn to deal with it or that you tell your friend that you just cannot handle it.

If you do the latter, that will be sad. Your friend has confided in you because he/she has sought you out for help in his/her mind dealing with the situation. He/she is also dealing with a lot of issues too.

Once you do get over being angry about it, tell your friend; your friend obviously told you because he/she wants your help and needs your support.

You should support her... Besides she wants to kill your male friend

Try to concentrate on something besides yourself. Your friend is going through a fucked up time right now...respect that.

tbh you're being kind of unfair - she'll be going through a rough time as it is, andd doesnt need her mate being wierd with her

Stick it out and hope these feeling u are having die down.

@randomjelly: That doesn't answer my question in the slightest. Thank you for not contributing.

@vulgarman: It's not a question of whether I can handle it. I just don't know if these feelings are normal or not.

But I got some advice from a friend that's gone through the situation before and he told me it's completely normal, it's just a phase and it passes. This site is garbage, shouldn't have wasted my time with this.

That`s something you`ll have to figure out yourself. If you can`t deal then it`s better to be honest. It`s a test of your friendship.