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[" Q23.Evaluate the following expression...

[" Q23.Evaluate the following expressions: "],[qquad [" i) "4cot^(2)45^(@)-sec^(2)60^(@)+sin^(2)60^(@)+cos^(2)90^(@)],[" ii) "3cos^(2)30^(@)+sec^(2)30^(@)+2cos0^(@)+3sin90^(@)-tan^(2)60^(@)]]

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