Trobough966 Trobough966

17-08-2014
Mathematics

Answered

Which of the following expression is equivalent to sin(5x) ?

Asin(3x) cos(2x) + cos(4x) sin(x)
Bsin(4x) cos(x) - cos(4x) sin(x)
Csin(3x) sin(2x) + cos(3x) cos(2x)
Dsin(3x) sin(2x) - cos(3x) cos(2x)
Ecos(3x) sin(2x) + sin(3x) cos(2x)

Verified Answer :

Anonymous Anonymous

17-08-2014

\(Use:\\sin(x+y)=sinxcosy+sinycosx\\-------------------------\\sin5x=sin(3x+2x)=sin3xcos2x+sin2xcos3x\\\\Answer:e)\)

Answer Link

sahiljamesbond9 sahiljamesbond9

17-08-2014

sin(5x)
=sin(3x+2x)
=sin3xcos2x+cos2xsin3x

Answer Link

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