Question

Help with law of sines?

Answer 1

I'm looking for angle B

Answer 2

XD can you help?

Answer 3

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

Answer 4

@amistre64 Can you come help?

Answer 5

@ganeshie8

Answer 6

hi

Answer 7

would you like to how to do it or the answer

Answer 8

please don't spam in my question XD

Answer 9

yes

Answer 10

wait how old are you guys?

Answer 11

thank you

Answer 12

I'm 17. Now, can you help?

Answer 13

yup im 14 doe

Answer 14

do u just want the answer

Answer 15

yea

Answer 16

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

Answer 17

and I want an explanation, not an answer

Answer 18

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

Answer 19

https://youtu.be/_syV6cDk7Lg

Answer 20

thats is the formula follow that

Answer 21

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

Answer 22

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 = .....

Answer 23

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

Answer 24

...

Answer 25

@IrishBoy123

Answer 26

I didn't even give options

Answer 27

@amistre64

Answer 28

what is angle C?

you can work that out

Answer 29

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

Answer 30

use you calculator

Answer 31

use you"r" calculator

Answer 32

all I have is a scientific calculator

Answer 33

that's more than you need .... in terms of hardware

arcsin (19sin40/13) = 70 -ish

does that help?!

Answer 34

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

Answer 35

buy one that does :p

lol!!

Answer 36

so what is B?

does your scientific calculator have "+" and "-" buttons ?!?!

Answer 37

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

Answer 38

yes, hahaha

Answer 39

sounds about right!!

Answer 40

okay, can you help with the law of cosines?

Answer 41

fire away
but open a new thread

always open a new thread for a new question

Answer 42

I know that.