计算:sin60°×cos30°-1/2=

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计算:sin60°×cos30°-1/2=
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计算:sin60°×cos30°-1/2=
计算:sin60°×cos30°-1/2=

计算:sin60°×cos30°-1/2=
sin60°×cos30°-1/2
=(√3)/2×(√3)/2-1/2
=3/4-1/2
=3/4-2/4
=1/4