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anonymous

  • one year ago

Find the exact value of the trigonometric function. Do not use a calculator. cot(-5pi/4)

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  1. anonymous
    • one year ago
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    @ phi

  2. anonymous
    • one year ago
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    @freckles

  3. freckles
    • one year ago
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    do you know that cotangent is an odd function

  4. anonymous
    • one year ago
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    i did not

  5. freckles
    • one year ago
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    that means cot(-x)=-cot(x)

  6. anonymous
    • one year ago
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    so confusing lol

  7. freckles
    • one year ago
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    \[\cot(\frac{-5\pi}{4})=-\cot(\frac{5\pi}{4})\]

  8. freckles
    • one year ago
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    sin, csc, tan, cot are all odd functions cos, sec are even functions

  9. freckles
    • one year ago
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    anyways you should see 5pi/4 on the unit circle

  10. freckles
    • one year ago
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    @Tazmaniadevil do you see 5pi/4 on the unit circle should be in quadrant 3

  11. anonymous
    • one year ago
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    ok

  12. anonymous
    • one year ago
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    umm i do not

  13. freckles
    • one year ago
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    do you see 225 deg because that is the same thing in degrees

  14. anonymous
    • one year ago
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    yes i think

  15. freckles
    • one year ago
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    ok what is the x and y coordinate given there

  16. anonymous
    • one year ago
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    wheres the cordinates

  17. freckles
    • one year ago
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    http://buildingaunitcircle.weebly.com/uploads/6/2/2/3/622393/9409299.gif

  18. freckles
    • one year ago
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    the coordinates are the things in ( , )

  19. freckles
    • one year ago
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    (x,y) x is the cosine value y is the sine value

  20. anonymous
    • one year ago
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    so it was the one with the twos right on the left side

  21. freckles
    • one year ago
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    both x and y are -sqrt(2)/2 there \[\cot(-\frac{5\pi}{4})=-\cot(\frac{5\pi}{4})=- \frac{\cos(\frac{5\pi}{4})}{\sin(\frac{5\pi}{4})}=-\frac{\frac{-\sqrt{2}}{2}}{\frac{-\sqrt{2}}{2}}\]

  22. freckles
    • one year ago
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    you can simplify that

  23. anonymous
    • one year ago
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    smh how do i simplify that ?

  24. freckles
    • one year ago
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    what is 5/5 =? 6/6=? 3/3=?

  25. anonymous
    • one year ago
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    1

  26. freckles
    • one year ago
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    12/12= -12/-12=?

  27. freckles
    • one year ago
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    yes

  28. freckles
    • one year ago
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    so you have -1 because there is negative in front of that mess

  29. anonymous
    • one year ago
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    right

  30. anonymous
    • one year ago
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    @phi

  31. anonymous
    • one year ago
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    @dan815

  32. freckles
    • one year ago
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    @tazmaniadevil did you have another question

  33. anonymous
    • one year ago
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    yes is -1 my answer

  34. Nnesha
    • one year ago
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    \(\color{blue}{\text{Originally Posted by}}\) @freckles so you have -1 because there is negative in front of that mess \(\color{blue}{\text{End of Quote}}\) \(\color{blue}{\text{Originally Posted by}}\) @Tazmaniadevil yes is -1 my answer \(\color{blue}{\text{End of Quote}}\)

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