trig identity ??

[variable]

is there any way to simplify the following,

(1/2)*U*(a^2)*(6/a*r + 3*d/(a*r^2) - a/r^3)cos(t) - (1/4)*U*(a^2)*(6/a*r + a/r^3)*sin(t)

thanks

 

[Deleted member 4993]

is there any way to simplify the following,

(1/2)*U*(a^2)*[6/a*r + 3*d/(a*r^2) - a/r^3]cos(t) - (1/4)*U*(a^2)*[6/a*r + a/r^3]*sin(t)

thanks

According to my definition of simplification - nothing else "fruitful" can be done.