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Flag Trigonometry> Solve: sin3x Answer: (pi(8n-1/4,2pin) U (...
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Solve:sin3xAnswer:(pi(8n-1/4,2pin) U (pi(8n+1/4,pi(8n+3/4) U (pi+2pin,pi(8n+5/4) .

Sarthak Agrawal , 9 Years ago
Grade 12th pass
anser 2 Answers
Sarthak Agrawal

Last Activity: 9 Years ago

question is sin 3x is less than sin x

Anil Kumar

Last Activity: 9 Years ago

sin3x=sin(2x+x)
         =sin2xcosx+cos2xsinx=2sinxcosxcosx+(cos2x-sin2x)sinx=2sinxcos2x+sinxcos2x-sin3x
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