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Question Number 11594 by JAZAR last updated on 28/Mar/17
please how can demonstred   sin(2x)_ /cos(2x)=2sin(2x)
pleasehowcandemonstredMissing \left or extra \right
Answered by mrW1 last updated on 28/Mar/17
that′s not true!  sin (2x)/cos (2x)=tan (2x)≠2sin (2x)    but  sin (4x)/cos (2x)=2sin (2x)  since sin (4x)=2sin (2x)cos (2x)
thatsnottrue!sin(2x)/cos(2x)=tan(2x)2sin(2x)butsin(4x)/cos(2x)=2sin(2x)sincesin(4x)=2sin(2x)cos(2x)

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