√15/√30 = √(15/30) = √(1/2)
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The square root of 30 is: ± 5.477226
Multiplying the radicands of the two together, sqrt(2) x sqrt(15) is equal to sqrt(2 x 15) = sqrt(30).
It is equal to: 2 times the square root of 30
30 degrees or pi/6