Q23- ans bwside
Max value of 4sin2y4sin^2y4sin2y is 4
Min value of tan4x+cot4xtan^4x+cot^4xtan4x+cot4x is 2
So equality holds when sin2y=1sin^2y=1sin2y=1
and tan4x+cot4x=2tan^4x+cot^4x=2tan4x+cot4x=2 or tan4x=1tan^4x=1tan4x=1
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