(Cos60sin30-tan45)/tan60
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(cos60sin30-tan45)/tan60
=(1/2×1/2-1)/3^1/2
=(1/4-1)/3^1/2
=-3^(1/2)/4
=(1/2×1/2-1)/3^1/2
=(1/4-1)/3^1/2
=-3^(1/2)/4
Answered by
1
1÷2×1÷2-1÷√3=. -3√3÷4
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