## anonymous 3 years ago Needing help(: PLEASE!

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1. anonymous

so whats the question sir

2. anonymous

3. anonymous

4. anonymous

answers to the bottom –70.3 12.4 11.1 6.5

5. anonymous

answers to the top 3.7 11.5 3.3 4.5

6. anonymous

Ok. so which trigonometric ratio would mean the ratio of $\frac{ 9 }{ x }$

7. anonymous

use sine theorem

8. anonymous

note sin(90)=1

9. anonymous

wait what lol sorry guys im not that great at this :(

10. anonymous

@Missaa143 at least you are aware that there is something called sin x, cos x etc etc etc ?

11. anonymous

yes

12. anonymous

ok, let's consider the first one

13. anonymous

use pythogorean theorem to find hypothenuse (the longest side of right triangle)

14. anonymous

okay right

15. anonymous

hypothenuse^2=5^2+x^2

16. anonymous

hypothenuse/sin(90)=x/sin(42)

17. anonymous

@Missaa143 so you know which side divided by which side is cos of any angle?

18. anonymous

okay gotcha!

19. anonymous

or you can go directly, x/sin(42)=5/sin(90-42)

20. anonymous

7/30

21. anonymous

= 0

22. anonymous

u can also use Tan of 42 = x / 5.

23. anonymous

true! ^

24. anonymous

ill say the first one is 3.3 ?

25. anonymous

$\frac{ x }{ \sin(42) }=\frac{ 5 }{ \sin48 }$

26. anonymous

no it will be 4.5

27. anonymous

Ooooo okay i get it!

28. anonymous

in 2nd one you have hypotenuse = x, and base = 9. So which trig. ratio means base/hypotenuse?

29. anonymous

i think its D ?

30. anonymous

I think it would be easier if you use tan(42)=x/5 => x=5tan(42)