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chels

  • 5 years ago

simplify this expression sec(x)cot(x)sin(2x)

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  1. myininaya
    • 5 years ago
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    are we trying to show this equals something else?

  2. chels
    • 5 years ago
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    nope, just trying to simplify it using identities

  3. anonymous
    • 5 years ago
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    Instead of sec(x) you can write 1/cos(x). Instead of cot(x), write cos(x)/sin(x). Instead of sin(2x), write 2*sin(x)*cos(x). Cancel like terms and out pops a clean new expression, that you will like. :)

  4. myininaya
    • 5 years ago
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    2cosx!

  5. myininaya
    • 5 years ago
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    thats not factorial by the way its an exclamation point

  6. chels
    • 5 years ago
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    oh thanks! i've got more too haha

  7. chels
    • 5 years ago
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    sin(2x)cos(5x) + cos(2x)sin(5x)

  8. myininaya
    • 5 years ago
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    oh mine thats shat sin(2x+5x)

  9. myininaya
    • 5 years ago
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    sin(7x)

  10. myininaya
    • 5 years ago
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    remember sin(x+y)=sinxcosy+sinycosx correct?

  11. chels
    • 5 years ago
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    oh, yes! i forgot that identity since it didn't look that way to begin with.

  12. chels
    • 5 years ago
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    where do i go once it's expanded?

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