Question

determine the measure of angle b of the triangle.
the problem is attached in the post. help please

Answer 1

one moment, i have this problem worked out already. check my math please.

Answer 2

Alright :)

Answer 3

Oh you're the one with the nice writing, I remember now.

Answer 4

hehhe thanks, did you see the drawing i uploaded?

Answer 5

Yep.

Answer 6

did you find an error in my math?

Answer 7

Checking

Answer 8

Yep

Answer 9

I calculate it as 28.858 degrees

Answer 10

yup what?

Answer 11

theyre all correct.

Answer 12

@wolf1728 calculate `it`?

Answer 13

yes please. i was under the impression to use law of cosine, then law of sins. then add both angles, subtract from 180

Answer 14

Using this calculator http://www.1728.org/trig4.htm
(yeah, my website) :-)

Answer 15

only problem, i cant use that on a test. i need to see how do this myself

Answer 16

it doesnt even show steps. im not here for free answers, im here to learn

Answer 17

Heck, I'm willing to explain it too.

Answer 18

can you work it out on paper and upload?

Answer 19

did i use wrong approach to this problem on the work that i did and submitted?

Answer 20

Sure can - I'll work it out right here.
I'm going by this page on my website:
http://www.1728.org/trigtut2.htm

Your problem involves 2 sides and an included angle - we need the law of cosines.

Answer 21

dabeezy - where are your calculations?

Answer 22

i used law of cosines. did you look at the work i submitted?

Answer 23

Where is your work?

Answer 24

attached at the top.

Answer 25

Okay I found it

Answer 26

i found my mistake

Answer 27

side a^2 = b^2 + c^2 -(2*b*c *cos(A))

Answer 28

its not 180=a+b+c. it is 180-c-a

Answer 29

.....180-75 degrees-46 degrees=59 degrees

Answer 30

okay so you found the mistake!
And you can go here:
http://www.1728.org/trig4.htm
to check your answers.

Answer 31

thank you.

Answer 32

other side = 5.9617
angles = 28.858 and 105.14

Answer 33

wait, thats what i had to begin with. both equations is the same thing. this still isnt correct

Answer 34

other side = 5.9617
angles = 28.858 and 105.14
what?

Answer 35

That's what my calculation page says - maybe we should work it out

Answer 36

those websites you upload is more confusing than how the book puts it. uploading websites isnt real help.

Answer 37

It's okay - I can work it our for you

Answer 38

yes work it out is what ive been asking from the beginning.
help=observing what i have,telling me where i went wrong.

Answer 39

Rather than looking over your work, why not just start at the beginning?
side a^2 = b^2 + c^2 -(2*b*c *cos(A))

Answer 40

if you observe my work, you would see that i have that on my paper worked out already

Answer 41

Yes, I know - but if I do it we both can see where you went wrong