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Question

verify the identity sin(4u)=2sin(2u)cos(2u)
Mar 25, 2010

Answers

LS
=sin(4u)
= sin(2u + 2u)
= sin(2u)cos(2u) + cos(2u)sin(2u)
= 2sin(2u)cos(2u)
= RS
Mar 25, 2010
Good
Dec 2, 2015

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