anonymous
  • anonymous
Rewrite with only sin x and cos x. sin 3x - cos x
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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anonymous
  • anonymous
Hint: Expand sin3x by writing it as : sin(x+2x)
myininaya
  • myininaya
Recall 3x=2x+x So sin(3x)=sin(x+2x) Use the formula sin(u+v)=sin(u)cos(v)+sin(v)cos(u) to expand sin(x+2x)
anonymous
  • anonymous
i was thinking that but i wasnt sure

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anonymous
  • anonymous
now all the options i am given have exponents in them how is that possible
anonymous
  • anonymous
That will be the case. sin2x is 2sinxcosx.
anonymous
  • anonymous
i dont understand...

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