I need help with this question:

I'm sure it's quite easy, but I totally forgot how the teacher explained it. I'm not so much asking for the answer, but how to actually get the answer.

Thanks
sine/cosine?
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sine/cosine?

We do have to use Sin/Cos/Tan or the inverse, but I forget how...
Sin^-1 (.45 / 6.10)
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sine, i think. but there must be another, easier way to find out. i can't think during the weekend, sorry bro

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sin x = .45/6.1

take the inverse sine of whatever .45/6.1 happens to be.
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SOHCAHTOA!!!

since the values are on the oposite and hypotenuse side from the angle in question, use sine.

So that would be: Sine^-1 (.45/6.10)

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I fail

Yup, pretty hard.

Thanks IronBeast and amp_322 and BFun

you ever hear of Soh Cah Toa? some "native american" chief or something my teacher told us....Sine- opposite/hypotenuse. Cosine- adjacent/hypotenuse. Tangent- opposite/adjacent...Soh Cah Toa. easy, right?
my guess is 15 cuz if the right angle is 90 the other looks to be a tad smaller and then that leaves a 15 or sumthing under 20 for the missing one

if u had a scientific calculator u could just use a formula and some trig stuff
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Quote by majonior
my guess is 15 cuz if the right angle is 90 the other looks to be a tad smaller and then that leaves a 15 or sumthing under 20 for the missing one

if u had a scientific calculator u could just use a formula and some trig stuff

um lol you can't really do that with math when you need a direct answer. If you were constructing a building could you just eye things? No.
yes i could i would just get a poorly constructed thing that almost looks like something
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Quote by majonior
my guess is 15 cuz if the right angle is 90 the other looks to be a tad smaller and then that leaves a 15 or sumthing under 20 for the missing one

if u had a scientific calculator u could just use a formula and some trig stuff

I did the question, the answer is 4 degrees. Close though...
Sine = opposite / hypotenuse

Sine = .45 / 6.1

Sine = .0737

Now to find the angle, do sine inverse, which is sine^-1

Sine^-1 of .0737 = 4.22 degrees.