The answer is P= 54.90degrees. To find degrees use arcsine. So I am going to find R then use that to find P, 5*sin(90)/13= 0.3438448706= 0.34 then to find angle do sin-1(0.3438448706)= 0.351. So let's stay with 35.10 is equal to R. 90+35.10= 125.10, then 180-125.10=P. P= 54.90.
This is what I Got....