anonymous
  • anonymous
Find the exact value of cot-1(1). please step by step :)
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
what is cot using sin and cos?
anonymous
  • anonymous
wait wat? explain... please
anonymous
  • anonymous
Do you know what cot means?

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More answers

anonymous
  • anonymous
cotangent
anonymous
  • anonymous
Yes, but what is cotangent?
anonymous
  • anonymous
sin/tan
anonymous
  • anonymous
cos/sin
anonymous
  • anonymous
Its cos/sin
anonymous
  • anonymous
|dw:1352671301171:dw|
anonymous
  • anonymous
idk wat to do next...
anonymous
  • anonymous
|dw:1352671590676:dw|
anonymous
  • anonymous
pi
anonymous
  • anonymous
No.
anonymous
  • anonymous
|dw:1352671674439:dw|
anonymous
  • anonymous
pi/2
anonymous
  • anonymous
No, what is cos in general?
anonymous
  • anonymous
Do you still need help with this?
anonymous
  • anonymous
yess
anonymous
  • anonymous
cos is x sin is y
anonymous
  • anonymous
wow ok im sorry u have to do the basic with me
anonymous
  • anonymous
|dw:1352671946433:dw|
anonymous
  • anonymous
ok
anonymous
  • anonymous
i understood that
anonymous
  • anonymous
OK, good.
anonymous
  • anonymous
Allright, So you are given cot^-1(1) The cot^(-1) means to find the angle where cot is 1 Cot is also (cos/sin) So if you look at the unit circle, where does cos equal 1? So cos is 2pi at 1 and sine is pi/2 at 1 If you put 2pi/pi/2 you get pi/4 So cos^-1(1) is pi/4
anonymous
  • anonymous
You can follow @zordoloom, but im not sure what he's doing. So your choice.
anonymous
  • anonymous
how would i get 2pi/pi=4pi
anonymous
  • anonymous
It doesnt equal 4pi. That would equal 2
anonymous
  • anonymous
If you put 2pi/pi/2 you get pi/4
anonymous
  • anonymous
No, you get 1.
anonymous
  • anonymous
and where do i find 1 on the unit circle
anonymous
  • anonymous
|dw:1352672476549:dw|
anonymous
  • anonymous
i know its 45degree but idk how?
anonymous
  • anonymous
gimme a sec
anonymous
  • anonymous
like idk how how cos 1 = pi/4 i get how to get it but not how u get thru the unit circle
anonymous
  • anonymous
what are the coordinates of pi/4 on the unit circle?
anonymous
  • anonymous
no how he got this
anonymous
  • anonymous
So if you look at the unit circle, where does cos equal 1? So cos is 2pi at 1 and sine is pi/2 at 1
anonymous
  • anonymous
cos equals one at 0 and 2pi
anonymous
  • anonymous
then somehow he got 4/p
anonymous
  • anonymous
dont write anything, just read what i write
anonymous
  • anonymous
okkkk
anonymous
  • anonymous
|dw:1352672770099:dw|
anonymous
  • anonymous
sin=1 at pi/2
anonymous
  • anonymous
Shhh..dont write.
anonymous
  • anonymous
|dw:1352672843682:dw|
anonymous
  • anonymous
|dw:1352672885447:dw|
anonymous
  • anonymous
|dw:1352672912951:dw|
anonymous
  • anonymous
ohhhhh
anonymous
  • anonymous
ok i get it
anonymous
  • anonymous
Ok, r u sure?
anonymous
  • anonymous
god ur amazing i would have been here for a few hours
anonymous
  • anonymous
yes i ddint multiply them
anonymous
  • anonymous
thanks, do you want me to give another example..so u can see if u get it right?
anonymous
  • anonymous
um ya an easy 1 please
anonymous
  • anonymous
OK, gimme a sec
anonymous
  • anonymous
\[ \cot^{-1} (-1)=?\]
anonymous
  • anonymous
pi
anonymous
  • anonymous
No.
anonymous
  • anonymous
3pi/4
anonymous
  • anonymous
Yes!
anonymous
  • anonymous
question is cot always on the 3rd quadrant?
anonymous
  • anonymous
No, the original question you asked, the answer was pi/4 (thats in the 1st quadrant)
anonymous
  • anonymous
but thats for cos
anonymous
  • anonymous
not cot
anonymous
  • anonymous
cos=1st cot=3rd
anonymous
  • anonymous
No, all quadrants apply for any trig identity.
anonymous
  • anonymous
oh i know but for those mostly
anonymous
  • anonymous
The answer is still no.
anonymous
  • anonymous
ok thanks :)
anonymous
  • anonymous
Np.

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