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[" 5.If "u=sqrt(a^(2)cos^(2)theta+b^(2)s...

[" 5.If "u=sqrt(a^(2)cos^(2)theta+b^(2)sin^(2)theta)+sqrt(a^(2)sin^(2)theta+b^(2)cos^(2)theta)],[" then the difference between the maximum and minimum "],[" vaves of "ur^(2)" is given by "],[[" (a) "(a-b)^(2)," (b) "2sqrt(a^(2)+b^(2))],[" (c) "(a+b)^(2)," (d) "2(a^(2)+b^(2))]]

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