prove that
tan 3x - tan 2x - tan x = tan 3x* tan 2x *tan x
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Step-by-step explanation:
∵tan3x=tan(2x+x)⇒tan3x=tan2x+tanx/1−tan2x.tanx⇒tan3x−tan3xtan2xtanx=tan2x+tanx⇒tan3x−tan2x−tanx=tan3xtan2xtanx
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