thx for help and please answer with very fully detailed explanation

A particle has the wavefunction u(r, 0, ) = R(r) A cos 0, and is in an eigenstate of the L operator. Find the normalization constant A. You may assume that R(r) is normalized. You may need: sin x cos xdx = - -cos' x. Select one or more: O a. 3 4 T O b. 3 O C . 3 2 T O d. 0 O e. 3 4 7 2