## anonymous one year ago One questions! LAW OF SINES ALGEBRA 2

1. anonymous

2. anonymous

Answer choices: A. 110. 0 degrees B. 153. 9 degrees c. 26.1 degrees D. 70.0 degrees

3. anonymous

lol very tricky

4. anonymous

Can you help me?

5. anonymous

it says use the law of sines to find angle B, but you cannot find angle B yet

6. anonymous

oh

7. anonymous

you want to use $\frac{\sin(B)}{b}=\frac{\sin(A)}{a}$ but you can't because you do not know $$b$$

8. anonymous

what you really need to do is find angle C first that you can do using the law of sines, since you know 3 out of the four numbers for the ratio needed

9. anonymous

$\frac{sin(C)}{19}=\frac{\sin(40)}{13}$ is where you have 3 out of the four numbers

10. anonymous

so $\sin(C)=\frac{19\times \sin(40)}{13}$ making $C=\sin^{-1}\left(\frac{19\times \sin(40)}{13}\right)$

11. anonymous

obviously you need so use some kind of calculator for this i can show you what i use

12. anonymous

okay

13. anonymous
14. anonymous

that is not your final answer of course, that is just C

15. anonymous

okay

16. anonymous

once you have $$C=69.69^\circ$$ you can find $$A$$

17. anonymous

you good from there?

18. anonymous

Okay, how would I write the equation?

19. anonymous

Not quite..

20. anonymous

@satellite73

21. anonymous

@triciaal pease help!

22. anonymous

will you help me? @triciaal

23. misty1212

you have two angles right?

24. misty1212

the total is 180

25. misty1212

$180-40-69.96$

26. misty1212

oops $180-40-69.69$

27. triciaal

do you see that Angle C is 70?

28. triciaal

Angles in a triangle add up to 180 40 + B + 70 = 180 solve for B

29. anonymous

I tried to tag him but hedidn't come back

30. anonymous

Yes, I see that angle C is 70

31. anonymous

70

32. triciaal

sorry I saw that after 2 tags together

33. anonymous

is that all? It's just that equation?

34. triciaal

that's what I got

35. anonymous

okay, thank you for your help!

36. triciaal

you are welcome