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Calculate : `3tan^(2)45^(@)-sin^(2)60^(@)-(1)/(3) cot^(2)30^(@)-(1)/(8) sec^(2)45^(@)`.

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Calculate : `3tan^(2)45^(@)-sin^(2)60^(@)-(1)/(3) cot^(2)30^(@)-(1)/(8) sec^(2)45^(@)`.
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`3 tan^(2) 45^(@) -sin^(2)60^(@)-(1)/(3)cot^(2)30^(@)-(1)/(8)sec^(2)45^(@)`
`=3xx(1)^(2)-((sqrt(3))/(2))^(2)-(1)/(3)xx(sqrt(3))^(2)-(1)/(8)xx(sqrt(2))^(2)`
` =3-(3)/(4)xx3-(1)/(8)xx2=3-(3)/(4)-1-(1)/(4)=(12-3-4-1)/(4)=(4)/(4)=1.`
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