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softballislove3

  • 3 years ago

Rewrite with only sin x and cos x. sin 3x - cos x

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  1. siddhantsharan
    • 3 years ago
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    Hint: Expand sin3x by writing it as : sin(x+2x)

  2. myininaya
    • 3 years ago
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    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)

  3. softballislove3
    • 3 years ago
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    i was thinking that but i wasnt sure

  4. softballislove3
    • 3 years ago
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    now all the options i am given have exponents in them how is that possible

  5. siddhantsharan
    • 3 years ago
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    That will be the case. sin2x is 2sinxcosx.

  6. softballislove3
    • 3 years ago
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    i dont understand...

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