#42 5.02 questions Precalculus

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May 15th, 2015

Sinx(1-2Cos2x+Cos4x)=Sin5x

1-2Cos2x+Cos4x=(1-Cos2x)2

1-Cos2x=Sin2x

Sinx*(1-Cos2x)2

=Sinx*(Sin2x)2

=Sin5x


May 15th, 2015

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