No, that's not correct.

What is the magnetic force on the proton?

q = 1.6 x 10 ^{- 19} C

v = 1.2 x 10⁷ m/s

B = 10 ^{- 3} T

cos 30^o = 0.866

Now, go back and try the calculation again. 

(c) 2000, Doug Davis; all rights reserved.