anonymous
  • anonymous
Needing help(: PLEASE!
TriC-MathMOOC
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
so whats the question sir
anonymous
  • anonymous
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anonymous
  • anonymous
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anonymous
  • anonymous
answers to the bottom –70.3 12.4 11.1 6.5
anonymous
  • anonymous
answers to the top 3.7 11.5 3.3 4.5
anonymous
  • anonymous
Ok. so which trigonometric ratio would mean the ratio of \[\frac{ 9 }{ x }\]
anonymous
  • anonymous
use sine theorem
anonymous
  • anonymous
note sin(90)=1
anonymous
  • anonymous
wait what lol sorry guys im not that great at this :(
anonymous
  • anonymous
@Missaa143 at least you are aware that there is something called sin x, cos x etc etc etc ?
anonymous
  • anonymous
yes
anonymous
  • anonymous
ok, let's consider the first one
anonymous
  • anonymous
use pythogorean theorem to find hypothenuse (the longest side of right triangle)
anonymous
  • anonymous
okay right
anonymous
  • anonymous
hypothenuse^2=5^2+x^2
anonymous
  • anonymous
hypothenuse/sin(90)=x/sin(42)
anonymous
  • anonymous
@Missaa143 so you know which side divided by which side is cos of any angle?
anonymous
  • anonymous
okay gotcha!
anonymous
  • anonymous
or you can go directly, x/sin(42)=5/sin(90-42)
anonymous
  • anonymous
7/30
anonymous
  • anonymous
= 0
anonymous
  • anonymous
u can also use Tan of 42 = x / 5.
anonymous
  • anonymous
true! ^
anonymous
  • anonymous
ill say the first one is 3.3 ?
anonymous
  • anonymous
\[\frac{ x }{ \sin(42) }=\frac{ 5 }{ \sin48 }\]
anonymous
  • anonymous
no it will be 4.5
anonymous
  • anonymous
Ooooo okay i get it!
anonymous
  • anonymous
in 2nd one you have hypotenuse = x, and base = 9. So which trig. ratio means base/hypotenuse?
anonymous
  • anonymous
i think its D ?
anonymous
  • anonymous
I think it would be easier if you use tan(42)=x/5 => x=5tan(42)

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