If k = sin(π/18)sin(5π/18)sin(7π/18), then the numerical value of k is _______.
If k = sin(π/18)sin(5π/18)sin(7π/18), then the numerical value of k is _______.
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If k = sin(π/18)sin(5π/18)sin(7π/18), then the numerical value of k is _______.