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[" 76."L(1)" and "L(2)" are two lines.If...

[" 76."L_(1)" and "L_(2)" are two lines.If the reflection of "L_(1)" on "L_(2)" and "],[" the reflection of "L_(2)" on "L_(1)" coincide,then the angle between "],[" the lines is "],[[" a."30^(@)," b."60^(@)," c."45^(@)," d."90^(@)]]

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