## anonymous one year ago Use a trigonometric ratio to find the value of x. Round the answer to the tenths’ place.

1. anonymous

2. BloomLocke367

Do you know about sin, cosin, and tangent and how to use them?

3. anonymous

Yes.

4. BloomLocke367

I was asking @barbdewysveck1 XD

5. anonymous

no

6. anonymous

Sorry..

7. BloomLocke367

don't be lol

8. anonymous

I figured it out! Thank you!!!!!

9. BloomLocke367

umm... didn't @barbdewysveck1 ask this question?

10. anonymous

whats the answer @KayKay83

11. dinamix

cos20 = 11/x @barbdewysveck1 i help u little

12. BloomLocke367

You shouldn't give or receive direct answers as they are against the CoC. @barbdewysveck1

13. BloomLocke367

but I'll happily walk you through what to do

14. anonymous

I got 2x^3 + x^2 + 4x - 3

15. anonymous

k just fast please

16. anonymous

$2x^3+x^2+4x-3$

17. anonymous

wrong question @BloomLocke367

18. anonymous

i mean @KayKay83

19. anonymous

srry @BloomLocke367

20. BloomLocke367

well you (should) know that $$\large sin=\frac{opposite}{hypotenuse},~cos=\frac{adjacent}{hypotenuse},~tan=\frac{opposite}{adjacent}$$, right?

21. BloomLocke367

we are working on the problem you posted, right?

22. anonymous

yep

23. BloomLocke367

okay. Do you understand what I just posted?

24. anonymous

no

25. anonymous

No worries.

26. BloomLocke367

well, basically, that just tells you whether to use sine, cosine, or tangent to find the missing piece. You want to start from the angle, and opposite, hypotenuse, and adjacent all are referring to the placement of the angle you're looking at.

27. BloomLocke367

|dw:1441414606178:dw| That is the first triangle you have.

28. BloomLocke367

you want to be looking, first, at the angle they gave you, which is angle a. You already know the measurement now where is x in relation to a? is it the hypotenuse, is it adjacent to that angle, or is it opposite of that angle?

29. BloomLocke367

@barbdewysveck1

30. anonymous

is the hypot the 11 or he longer one

31. BloomLocke367

the hypotenuse is always the side that is across from the right angle. so it's the longest one.

32. anonymous

k

33. BloomLocke367

are you following me? or do I need to re-explain something?

34. anonymous

im followin

35. anonymous

Let f(x) = 2x^2+x-3 and g(x) = x-1. Perform the indicated operation, then find the domain. (f*g)(x)? is my answer correct? , 2x^3 + x^2 +4x -3: domain: positive real numbers? This was my question....so sorry for confusion!. Never mind. ;)

36. BloomLocke367

okay, so you know that side x is the hypotenuse.

37. BloomLocke367

the only other side you need to worry about is the one they gave you. is AC (11) adjacent to or opposite angle A?

38. BloomLocke367

@KayKay83, please do not post your question under somebody else's question. If you need help, open a question and you can tag me if you like and I'll help you to the best of my ability or you can find someone else to help.

39. BloomLocke367

@barbdewysveck1, are you still with me?

40. anonymous

yep

41. BloomLocke367

okay. is AC opposite or adjacent to angle A?

42. anonymous

43. anonymous

I apologize. New to this and trying to learn rules.. So very sorry. 1st time I have ever asked a question. Never again.

44. BloomLocke367

yep :) now look at what I told you about sin, cos, and tan and tell me which one involves the hypotenuse and adjacent side.

45. BloomLocke367

It's alright, @KayKay83 :) Welcome to OpenStudy! I'll pm you a link to the CoC.

46. BloomLocke367

@barbdewysveck1

47. BloomLocke367

@barbdewysveck1, are you still here?