cos(x-π)tan(x-2π)tan(2π-x)/sin(π+x)
=(-cosx)tanx(-tanx)/(-sinx)
=(cotx)(tanx)(-tanx)
=-tanx
化簡:cos(x-派)tan(x-2派)tan(2派-x)/sin(派+X)
化簡:cos(x-派)tan(x-2派)tan(2派-x)/sin(派+X)
數(shù)學(xué)人氣：710 ℃時(shí)間：2020-10-01 03:15:14
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