sin平方π/3+cos四次方3π/2—tan平方π/3

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sin平孙穗方π/3+cos四次方3π/则局卜2—tan平方π/3
=(√3/腊散2)平方+0四次方-(√3)平方
=3/4+0-3
=-9/4

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3/4+0-3=-9/4

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(sinπ/册租3)^2+(cos3π/2)^4-(tanπ/3)^2
=(√3/2)^2+[cos(π+π/衫数2)]^4-(√3)^2
=3/或姿首4+[-cosπ/2)]^4-3
=3/4+0-3
=-9/4

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