2(cos^2 45 + tan^2 60)-6(sin45-tan^2 30)=6
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Step-by-step explanation:
2(cos²45+tan²60)-6(sin²45-tan²30)
=2(1/2+3)-6(1/2-1/3)
=2(1+6/2)-6(3-2/6)
=2(7/2)-6(1/6)
=7-1
=6
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