Question

In the triangle below, b = _____. If necessary, round your answer to two decimal places.

Answer 1

@SolomonZelman

Answer 2

Do you know the cosine law?

Answer 3

I can't draw it now, nut here is the image, https://www.google.com/search?q=cosine+law+formula&tbm=isch&tbo=u&source=univ&sa=X&ei=BqCBUu3nMNH6kQfzm4Fo&ved=0CEIQsAQ&biw=1920&bih=955#facrc=_&imgrc=sqEi5UD12NsJaM%3A%3BhCCTIxJT5lLiAM%3Bhttp%253A%252F%252Fwww.mathwarehouse.com%252Ftrigonometry%252Fimages%252Flaw-of-cosines%252Flaw-of-cosines-formula-and-picture2.gif%3Bhttp%253A%252F%252Fwww.mathwarehouse.com%252Ftrigonometry%252Flaw-of-cosines-formula-examples.php%3B533%3B221
plug your numbers in.

Answer 4

yeah i know that but how do you do it you only know one of the sides @SolomonZelman

Answer 5

you know the angle B, sum of angles is 180.

Answer 6

i need the side of C in order to get B

Answer 7

I am not sure, @Easyaspi314

Answer 8

First find angle B (pretty easy since you have two angles and the sum of all three angles is 180 degrees).

After you have angle B, use Law of Sines:
b/sin B = a/sin A

and you'll have b.

Answer 9

@AlvaroBravo @SolomonZelman

Answer 10

Oh, I see, I though the sin law doesn't work on the not-t=right-triangle.

Answer 11

not-right....

Answer 12

First of all, it's not a right triangle.
Second, it works for any triangle. (just that sin 90 = 1).

Answer 13

Law of Sines was designed for the non-right triangle.

Answer 14

I know it is not a right triangle, and tnx for clarefying.

Answer 15

welcome.

Answer 16

i got a negative number

Answer 17

can't be. try again.

Answer 18

i get -1.346

Answer 19

Redo the problem. Carefully.

Answer 20

i got it thanks

Answer 21

Welcome.