What is the angle between the given vector and the positive direction of the x-axis

What’s the direction involving the provided vector as well as the good
course of this x-axis? (Round your response to the closest level.
i +sqrt(15) j

75.52
θ=tan-1(√15)=76 level
i + √15j
θ = tan-1(√15/1) = 75.52

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