## gopeder 3 years ago OK I have two problems I'm stuck on can someone plz help me out and plz teach me how you solved it If b = 12, find c. If b = 3, find a.

1. gopeder

its a triangle btw

2. benice

feels like the question is missing something

3. gopeder

the Picture but i don't think you need it

4. benice

yes you need the pic ....its tells you the angles which tells the ratios of the sides to on another

5. benice

have you learned SOHCAHTOA? (theta$\sin \Theta=opp/hyp$ $\cos \Theta=adj/hyp$ $\tan \theta=opp/adj$

6. benice

|dw:1332188561682:dw|

7. benice

|dw:1332188855143:dw|

8. benice

for question a we know the adj and angle 60 degrees and we want to know hyp SohCahToa so we Cah $Cos \theta=adj/hyp$

9. benice

here adj = 12 , hyp = c and cos(60)

10. benice

i'd rather not tell you the answer but will help

11. aroub

OR did you take that: In semi equilateral triangle: The hypotenuse = 2 ( shorter leg) and the longer leg = square root of 3 times the shorter leg ?? * I think it's easier to use it in this problem.

12. gopeder

Kinda confused So we are just talking about the first one correct? haha im trying to put it all together in my head..

13. benice

ok yes we talking about the first one

14. benice

|dw:1332189439391:dw|

15. gopeder

ok that kinda makes more understand able and clear

16. benice
17. benice

can you work out c now?

18. gopeder

hmm SOH stands for Sine equals Opposite over Hypotenuse. B is the opposite side and C is the hypotenuse

19. gopeder

so its 12 over x 12 being B and x being C?

20. benice

|dw:1332189795874:dw|

21. benice

your getting the idea which is good ... you just mixed up the sides

22. gopeder

cant read what B is But on the diagram its the opposite side

23. benice

in the question 1 you said b =12 find c|dw:1332190095344:dw|

24. gopeder

Ugh im still confused what do I need to do to go about doing to find C? i thought I had to 12 over x

25. benice

cos (60)=12/x

26. benice

yes you right ... my bad you could also use |dw:1332190384723:dw|

27. benice

now can you draw in the opp , the adj and hyp

28. gopeder

Oh my god im confused :/ X can't = 6

29. benice

sin=opp/hyp sin 30 = 12/x 1/2=12/x .5x=12 x=24 .. sry your right i got it wrong

30. gopeder

Oh ok!! haha I thought it was 24 then you said 6 and i was TRIPPING out lmafo

31. gopeder

Ok for the second part im going to try that one can you check my answer? :)

32. benice

glad you get it ... certainly best of luck

33. gopeder

in this case its 3/x right?

34. gopeder

"TOA stands for Tangent equals Opposite over Adjacent."

35. gopeder

No that cant be right

36. gopeder

Trigonometry in geometry lol YEA!!! anyways the answer is 6.. found out after a lot of research on how do solve this problem @benice

37. gopeder

btw that was a Female dog to do.....lol

38. benice