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BELL SYSTEM TECHNICAL JOURNAL 



By setting cos 20 = in (6.3), so that d = 45°, it is found that 



(vT^^2)/27r - P(45°';6), (6.10) 



DISTRIBUTION FUNCTION, P (9 ; b) 



Fig. 6.1 — Distribution function for the angle. 



whence (6.3) can be written 



P{d;b)/Pi45°;b) = 1/(1-6 cos 20). 



(6.11) 



