Hi guys. They say that 2 is company and 3

is a crowd, and this triangle here is crowded with 3 pieces of information because we are

looking at 1 piece of information and that is the missing pronumeral here it is here,

the little c. the length across there, the distance is what we are looking for. So what

are the 3 pieces of information that we do have? Well first of all we have the big B

here is which is the angle 47 degrees and opposite that is the length or distance which

is 5.8kms and up here the other piece of information, the final piece, is 68 degrees that is big

capital C opposite the little c pro numeral that we are looking for. We are going to use

sine rule , we are going to substitute into this formula and then we are going to cross

multiply and we are going to shoot through in to the solution which is little c the pro

numeral. So let us put the numbers into the formula

here. So it is already been labeled here in the triangle. So we have got little b which

is opposite big B right there so let us start up with this part of the formula right here.

Can you see that little b right there, let us put that there, so little b is 5.8 kms,

so there it is there we are substituting it in there. So we have – all over sinB which

is going to be sine capital B and you can see what that is – sine capital B up across

there is 47 degrees that goes there which is right over here. And that equals little

c over sin big C, let us write down the little c – right there all over –

sine 68 that is the big C right there, the

angle let us put that in there – okay, there it is. Let us point out one more time to ensure

we are correct. So we got little b on big B, sinB there is little b, little b, opposite

right there let me just draw a line so we can see it, there and there is another line

that goes across there. So double checking 5.8 over sin47 equals little c, there is the

little c opposite 68 so sin68 right there so let us cross multiply so we can come up

with it. So it is going to be c times sin47 degrees and that equals this way, we have

– (5.8 times sin68 degrees) okay, there is our equation we want to get c by itself,

the pronumeral so we can find the solution so that is the guard we want by itself and

we want as the subject to this equation. So let us divide both sides by sin47 so we can

eliminate that there right. So we divide by sin47, divide by sin47 – so therefore this

part here it cancels, so cancel that, cancel that, because sin47 divide by sin47 is 1 as

you already know. So we are left with 5.8 times sin68 on sin47 and that is what c equals

right – c equals that – okay let us put that in to the calculator directly– 5.8

times sin68 divided by sin47 then press equals. So our c equals, once we put that in and the

answer will be in km, it is the length right across there, there is our little c that equals

– 7.35km. Take a minute to check out in our website

at

http://www.vividmaths.com. You will find additional resources, cheat sheets, transcripts and other

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I LOVE U

Thanks guys!

Brilliant

So extremely helpful! I like the way you say "Big B", sounded like bigby, bigby π

strange way of writing an 8, two circles!

if I pass my exams it is because of this guy

Excellent, I might pass my maths exam.

i got 8.3914……. where did i go wrong

mega mind

I like how u acctualy tell us how and what to put in our calculators. Reallyy helps

1/10 would not consume again

Thanks fam!

I'm so fucked

really good better than my piece of shit geometry teacher

ANIMAL

ANIMAL

Did someone day release the beast?

FANNY PACK ANIMAL

Didn't help a bit

Which video editing software did you use to make this video

2.. is. Company..3.. is..crowdπ…great..video

That 5.8 looks like 5*8 lol.

why am i getting 5.79 on my calculator???

My maths teacher spent 2 lessions teaching us this and i didnt get it.

This video taught me in 5 mins

Roast!

Thanks

You sir are a lifesaver

Sir hindi language me

Very good help ππ

please shutup

Thank you so much I finally understand what to do

Legend

Oh ohhh

Thankyou so much. This helped me a lot !!

Maths GCSE tomorrow, whoop!!!!

You sir are a living legend

Lil b

i was too distracted by his accent

great video

Youse is a dope nigga mai g

God bless this man. I'd seriously be failing maths without him, got my Exams in May, feeling fairly confident already thanks to this guy.

Thank you so much saved me on my homework. π

Best tutorial yet thx

boi why would u do this