f(x)=1/2sin^2x[1/tan(x/2)-tan(x/2)]+根号3/2cos2x1)若0
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f(x)=1/2sin^2x[1/tan(x/2)-tan(x/2)]+根号3/2cos2x1)若0
f(x)=1/2sin^2x[1/tan(x/2)-tan(x/2)]+根号3/2cos2x
1)若0
f(x)=1/2sin^2x[1/tan(x/2)-tan(x/2)]+根号3/2cos2x1)若0
^这是什么符号……?
根号3/2cos2x化简:根号3/2(cos2X方-sin2X方)——再化简
1/tan(x/2)-tan(x/2)做多题就知道了,耐心点化简也可以
最后两边会消掉
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