Question

csc 5pi/6 =? and cot 5pi/6 =? i need the answer quickly please

Answer 1

Do you know the sine and cosine of 5pi/6?

Answer 2

No the question is just like that

Answer 3

I know, but as a reference, it pays to know (by heart) the sines and cosines of such special angles... and \(\Large \frac{5\pi}{6}\) is one such special angle...

That said, what is its sine and cosine?

Answer 4

I realy don't know i have an online exam now and i have to get a good score in it or i will lost 1 year in the universty )):

Answer 5

Well then, brush up ^_^
Come, tell me what the sine and cosine of \(\Large \frac{5\pi}{6}\) are... look them up in a unit circle if you have to ...

Answer 6

How can i fined it?

Answer 7

Here...
http://upload.wikimedia.org/wikipedia/commons/thumb/4/4c/Unit_circle_angles_color.svg/300px-Unit_circle_angles_color.svg.png

The unit circle, just look for \(\Large \frac{5\pi }{6}\) and the left coordinate corresponds to the cosine of the angle while the right-coordinate corresponds to the sine of the angle.

Answer 8

The cosin of 5pi/6 is 150 degree i think.

Answer 9

Wrong... that's the same \(\Large \frac{5\pi}6\) only in degrees... look again (do you not know how to refer to the unit circle? D: )

Answer 10

Actually no i didn't study math from 1 and half year i forgot lot of things

Answer 11

Then... I'd suggest a comprehensive review ^_^

Answer 12

And i'm not a native speaker there is lot of new words i can't understand now

Answer 13

Where are you from, then? (Out of interest)

And I'm already telling you how to use the unit circle... for each angle (including \(\Large \frac{5\pi}6\) ) there is a pair of coordinates, something like (x,y)
the left-coordinate (x) is the cosine of the angle while the right coordinate (y) is the sine of the angle.

I know you can do this ^_^

Answer 14

I'm from Oman ^_^. i will try it

Answer 15

Ahaa so -sqrt(3)/2 is cosin and 1/2 is sine right?

Answer 16

See? You can do it ^_^
Now, the cosecant of the angle [csc] is simply the reciprocal of the sine.
That means, just flip the sine (switch numerator and denominator).

Answer 17

so the answer is 2/1?

Answer 18

2. 2/1 is just 2.
That's the cosecant.

Answer 19

Ahaa that's really easy thanks man. i will try to solve the other one

Answer 20

Remember...the cotangent [cot] of an angle is simply
cos/sin.
Divide the cosine by the sine.

Answer 21

So it will be like that

-sqrt(3)/2/2/1?

Answer 22

Yes... but simplify that :)

Answer 23

is - 1.73 the right answer?

Answer 24

Oh, please don't use a calculator. Simplify by cancelling out, but leave the square roots as is.

Answer 25

Unless it is specifically instructed to use a calculator, of course.

Answer 26

so the answer will be -sqrt(3)

Answer 27

That is correct ^_^

Answer 28

Thanks a lot. By the way where are you from?

Answer 29

Muslim?

Answer 30

No ^_^
Sorry.

Answer 31

Hhh that's okay bro.

Answer 32

Hey do you have free time to help me with the exam i have 10 questions left

Answer 33

But that might be considered cheating. D:

Answer 34

Yaah i know but all my friends did that because we didn't stady math for like 2 years i will review it of course but i have to complete this test by tomorrow

Answer 35

hang on...