anonymous
  • anonymous
Write the following as an algebriac expression in "x" cot(arccos(3x)), 0 ≤ x ≤ 1/3
Calculus1
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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misty1212
  • misty1212
HI!!
anonymous
  • anonymous
This problem makes my head hurt :( lol
misty1212
  • misty1212
this is really not that bad at all first step: draw a triangle with some angle \(\theta\) labelled next step, since \[\cos(\theta)=3x\] put a \(3x\) on the "adjacent" side and make the hypotenuse 1

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misty1212
  • misty1212
|dw:1434129152248:dw|
misty1212
  • misty1212
there is a picture of an angle whose cosine is \(3x\) what you need is the "opposite" side which you find via pythagoras
misty1212
  • misty1212
let me know what you get it should have a square root in it
anonymous
  • anonymous
:o let me try
anonymous
  • anonymous
sqrt(-9x^2 + 1) ?
misty1212
  • misty1212
yes although \[\sqrt{1-9x^2}\] looks neater
anonymous
  • anonymous
haha alright
misty1212
  • misty1212
now you want the cotangent of that angle, which is "adjacent over opposite" so you are pretty much done, just write it i
anonymous
  • anonymous
Yeah I got it form here, you just made that so easy it's ridiculous. Thank you so much
misty1212
  • misty1212
it is ridiculously easy if you know what you are doing hope your head does not hurt anymore \[\color\magenta\heartsuit\]
anonymous
  • anonymous
It's alleviated :)

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