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Explanation:
Using Pythagorean theorem
1^2 = 1/2 ^2 + m^2
3/4 = m^2
m = sqrt (3) / 2
Using trig relations Tan Φ = opposite / adjacent = sqrt(3)/2 / 1/2 = sqrt 3
tan Φ = sqrt3
Φ = (arctan ( sqrt 3) ) = pi/3 or 60 degrees (use a calculator)
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