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[" 0.If "0<=x<=pi,81^(sin^(2)x)+81^(cos^...

[" 0.If "0<=x<=pi,81^(sin^(2)x)+81^(cos^(2)x)=30" then "x=],[[" 1) "(pi)/(6)," 2) "(pi)/(4)," 3) "(pi)/(15)," 4) "(pi)/(8)]]

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