Help with law of sines?

- BloomLocke367

Help with law of sines?

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- BloomLocke367

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- BloomLocke367

I'm looking for angle B

- BloomLocke367

XD can you help?

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## More answers

- BloomLocke367

I know the law of sines, and before I can find b, i need to find the angle c. so right now I have 13sinx=19sin40

- BloomLocke367

@amistre64 Can you come help?

- BloomLocke367

@ganeshie8

- Durply

hi

- Durply

would you like to how to do it or the answer

- BloomLocke367

please don't spam in my question XD

- Durply

yes

- Durply

wait how old are you guys?

- BloomLocke367

thank you

- BloomLocke367

I'm 17. Now, can you help?

- Durply

yup im 14 doe

- Durply

do u just want the answer

- anonymous

yea

- BloomLocke367

as long as you can help, I don't care.

- BloomLocke367

and I want an explanation, not an answer

- anonymous

here is an awesome trig sheet that i made. you will find the law of sines on the right side. learnix.net/wordpress/wp-content/uploads/Trig-Cheat-Sheet-1.4.pdf

- Durply

https://youtu.be/_syV6cDk7Lg

- Durply

thats is the formula follow that

- BloomLocke367

I already know the law.. I'm just not sure how to continue. I have the formula already

- IrishBoy123

work out angle C first, and do it yourself
that will give you angle B.
you sais: "13sinx=19sin40"
you called it x. call it C, be consistent with the diagram
so
13sinC=19sin40
C = .....
B = .....

- BloomLocke367

how do I work it out from there? that's why I'm stuck @IrishBoy123

- BloomLocke367

...

- BloomLocke367

@IrishBoy123

- BloomLocke367

I didn't even give options

- BloomLocke367

@amistre64

- IrishBoy123

what is angle C?
you can work that out

- BloomLocke367

right now I have sinC=19sin40/13. what do I do next?

- IrishBoy123

use you calculator

- IrishBoy123

use you"r" calculator

- BloomLocke367

all I have is a scientific calculator

- IrishBoy123

that's more than you need .... in terms of hardware
arcsin (19sin40/13) = 70 -ish
does that help?!

- BloomLocke367

ohhh.. my calculator doesn't have arcsin. that was my problem

- IrishBoy123

buy one that does :p
lol!!

- IrishBoy123

so what is B?
does your scientific calculator have "+" and "-" buttons ?!?!

- BloomLocke367

XD okay. so then I have a and c, they add up to 110. 180-110=70 so angle b is 70, right?

- BloomLocke367

yes, hahaha

- IrishBoy123

sounds about right!!

- BloomLocke367

okay, can you help with the law of cosines?

- IrishBoy123

fire away
but open a new thread
always open a new thread for a new question

- BloomLocke367

I know that.

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