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Consider a spin-1/2 particle with a magnetic moment. At time t = 0, the state of...

Consider a spin-1/2 particle with a magnetic moment. At time t = 0, the state of the particle is 0c1t = 029 = 0 +9. The system is allowed to evolve in a uniform magnetic field B = B0(x^ +z^)/sqrt2

NOTE;the megnetic field is in general direction i just want to ask how to calculate the value of angles which are theta and fi from the given megnetic field

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