Charged particle at what angle experiences 2.4 times the magnetic force?

[MrDMD83]

When a charged particle moves at an angle of 13° with respect to a magnetic field, it experiences a magnetic force of magnitude F. At what angle (less than 90°) with respect to this field will this particle, moving at the same speed, experience a magnetic force of magnitude 2.4F?

 

[HallsofIvy]

Once again! Did you bother to read the forum rules?