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[" In Fig."5.47" ,the value of "cos phi"...

[" In Fig."5.47" ,the value of "cos phi" is "],[[" (a) "(5)/(4)," (b) "(5)/(3)," (c) "(3)/(5)," (d) "(4)/(5)],[," D ",5],[," E ",(1)/(9)times2/ theta," A "],[," Fig."5.47,3," B "]]

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