Question

cosx=4/5, csc x<0 please help

Answer 1

Is there a question here somewhere?

Answer 2

yes sorry find sin2x, cos2x, tan2x

Answer 3

It definatley would help to draw a picture! Try that.

Answer 4

yes you definitely can

Answer 5

sure you will get a sticker lol

Answer 6

on no they are different

Answer 7

ok hold on. let me figure it out

Answer 8

right, then mark the sides, I mean opp, hypotenus and adja

Answer 9

hyp=5
adj=4
we don't have opp

Answer 10

you are right, so how to find opp?

Answer 11

hyp^2= adj^2 +opp^2

Answer 12

yes, yes, yes, pythagorean,!!! give me the answer

Answer 13

5^2= 4^2+ opp^2

Answer 14

hold on, what do you want to do? find x ? or find other trigs?

Answer 15

+or - 3

Answer 16

find sin 2x, cos 2x and tan 2x

Answer 17

back to your problem, you have 2 solution is +- 3, choose 1. don't forget, the sign just show where the point is.

Answer 18

i know that's why I am confused on what to work on since i understand. I posted this four days ago and we worked on it in school.

Answer 19

choose solution, just 1

Answer 20

i don't understand what you mean

Answer 21

you have +- 3, choose 1, 3 or -3?

Answer 22

I beleive is -3 because csc <0

Answer 23

right

Answer 24

yeap

Answer 25

now, you have opp, can figure out sin and then tan. that's it

Answer 26

but there is one more problem , you just have cos x , and sinx not cos 2x, or sin 2x. you must convert to those to find the final answer

Answer 27

sin2x= 2sin xcos x

Answer 28

yeap.

Answer 29

-24/5

Answer 30

cos2x= sin^x- cos^x

Answer 31

I don't calculate it for you, you must know how to do it. i will not be with you on final test day. ok?

Answer 32

by the way can i switch the position of sine and cos?

Answer 33

you have book, and the answer on it. do, and check, if you get stuck, Madaamm, Me here, available for you.. hehehe..

Answer 34

i know

Answer 35

on what?

Answer 36

it is not in the book. it is one of the even #

Answer 37

it sounds like a pervert is wooing a beaauuutiiifulll woman, right? hahahaha..

Answer 38

on any of the formulas

Answer 39

you really sound very happy today when i am all worried about the finals

Answer 40

surely you can switch the position of a product as ab = ba , don't just replace sin by cos .because you cannot do it

Answer 41

you forgot the fact that I am qualified enough to not take final, right? my take home final exam is in perfect condition, I just study Cal3 , done, why am I not happy???

Answer 42

i mean the one for cos2x= sin^2- cos^2

Answer 43

i mean is the other way around cos^2x - sin^2x

Answer 44

that's what I am saying.

Answer 45

NON, NON, Mademoisell, not at all,

Answer 46

i can't switch?

Answer 47

whao you are working on your french too? you forgot e at the end.

Answer 48

no, just a very simple word

Answer 49

you cannot!! that 's it

Answer 50

ok tomorrow we will work more on log

Answer 51

and on simplifying that is really really driving me crazy

Answer 52

if you stuck at somewhere too anoying, let it there. doesn't matter, go for other question to get credit.

Answer 53

here is another problem. simplify cos^3 x+ sin^2 xcosx

Answer 54

factor cos x out

Answer 55

i did but it does not look right

Answer 56

why?

Answer 57

cosx (cos^2 v + sin^2 x) = cos x only, the term in bracket =1

Answer 58

don't i put +1 next to sin^2x?

Answer 59

you take cos out, inside is cos^2 +sin^2 , where is 1?

Answer 60

didn't you say last time that if i take a number out i have to replace it by 1 to show that there was something there?

Answer 61

the cos that is multiplied by sin^2x

Answer 62

ok I got what you mean, but 1 sin^2 = sin^2 only.

Answer 63

I am leaving now, I want to sleep, we can work efficiently tomorrow. I 'll be there at 1:00 for you . Prof Gao asked me to meet to discuss about tutoring . He may ask me be a tutor in lab, but how? with my English? how? no way, right?

Answer 64

don't worry you will do a great job

Answer 65

I am understanding math because of you so whatever he says, accept it. you really really deserve it. go to bed we will work on some tomorrow. you can come around 3. it is ok i will do more work in the meantime so we have more to work on

Answer 66

ok, but I am worried for Sydney and you, if i were a tutor, I cannot say no to other. I don't want sit there and tutor for 016 017 students when Sydney has to take second time around for linear algebra.

Answer 67

she really need help with both linear and cal 2.

Answer 68

Summer 1 I take English. Although I let it aside long time but I am big confident to say that it will be back to me after 1 week I focus on. I will review everything from cal2 and try to explain algebra in simplest way to help Sydney

Answer 69

my delete and backspace are not working. i don't know why

Answer 70

hey, bthere there is means?

Answer 71

just close the question is ok, no one come to closed question

Answer 72

lol by keyboard is attact ed by aliens

Answer 73

you know that when you say something in fast, i don't understand, now you type in abbreviate, you want me crazy?

Answer 74

I will see you around 3? take a rest because you and I have a lot of work to do. you will be testing me. A lot

Answer 75

close the question now

Answer 76

you should prepare the problems you have, I pick and what if it is too easy or not the problem you don't get. actively working please, only one you know what you need

Answer 77

I am laughing because i cannot delete anything,.I typed. the keyboard its not working. I felleel like i need anything sometimes other times i feel like i am ready to take the final. Am I making sense?

Answer 78

I want to sleep, bye you now

Answer 79

I am going too so i can start early. have a good night see you tomorrow

Answer 80

thanks ofr evverything