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[" 9.A line makes the same angle "theta"...

[" 9.A line makes the same angle "theta" with each of the "x" -and "],[z" -axes.If the angle "beta," which it makes with the "y" -axis,is "],[" such that "sin^(2)beta=3sin^(2)theta," then "cos^(2)theta" equals "],[[" (a) "(2)/(3)," (b) "(1)/(5)," (c) "(3)/(5)," (d) "(2)/(5)," 19.The twe "]]

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