Trim in a fixed wing means "get the skid ball in the middle, use elevator and aileron trim to remove all control forces."
In a helicopter, Trim means "Get the f*****g thing in balance, dopey!" because any power or speed change will affect the balance (skid ball), and then fine-tune the power settings and attitude for the airspeed.
"Pitch" has 2 meanings in choppers - one is for the nose up/down attitude, and the other is for the collective pitch setting. Try to use "power" for the collective and "attitude" for cyclic, because the equation is said as "Power + Attitude (in Balance) = Performance" , not "Collective plus Cyclic (with pedals) = Performance."