化简:cos(x-派)tan(x-2派)tan(2派-x)/sin(派+X)
问题描述:
化简:cos(x-派)tan(x-2派)tan(2派-x)/sin(派+X)
答
cos(x-π)tan(x-2π)tan(2π-x)/sin(π+x)
=(-cosx)tanx(-tanx)/(-sinx)
=(cotx)(tanx)(-tanx)
=-tanx