anonymous
  • anonymous
Solve cos^-1(3x)-6cos3x=4sin3x
Mathematics
katieb
  • katieb
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anonymous
  • anonymous
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anonymous
  • anonymous
is it \[\cos^{-1}3x ------------ or ---------- \frac{1}{\cos 3x}\]
anonymous
  • anonymous
Aren't they the same thing?

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anonymous
  • anonymous
no
anonymous
  • anonymous
Then the first one .
anonymous
  • anonymous
1 - 6 cos^2 3x = 4 sin3x cos3x = 2 sin 6x - ive assumed 1 / cos 3x
anonymous
  • anonymous
\[2\cos^23x=1+\cos6x\]
anonymous
  • anonymous
Can you show steps?
anonymous
  • anonymous
no
anonymous
  • anonymous
Wonderful .
anonymous
  • anonymous
this time do yourself
anonymous
  • anonymous
And what do you think I would be doing if I had any idea on how to solve them?
anonymous
  • anonymous
When you are trying you are progressing
anonymous
  • anonymous
Sleeping is too mainstream anyways . Thank you for your help .

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