sin方(2x-π/6)+sin(2x-π/6)化简如题
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sin方(2x-π/6)+sin(2x-π/6)化简如题
sin方(2x-π/6)+sin(2x-π/6)化简
如题
sin方(2x-π/6)+sin(2x-π/6)化简如题
就是配方
原式=[sin(2x-π/6)+1/2]^2-1/4.
sin方(2x-π/6)+sin(2x-π/6)化简如题
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