Question

can someone help with sines and cosines please?

Answer 1

In Δ XYZ, XY = 6.32, YZ = 5.83, and XZ = 11.05. What is m∠Y , correct to one decimal place?

Answer 2

you could use the law of cosines. Do you know it ?

Answer 3

yeah but there are no angles known for me to do this

Answer 4

Yes, they give you the lengths of the 3 sides.
Can you type out the law of cosines ?

Answer 5

sin A/a= sin b/b

Answer 6

that is the law of sines. useful, but not for this problem

Answer 7

oh well then i guess i cant remember

Answer 8

but thanks for the help

Answer 9

When you get a chance, look at
http://www.khanacademy.org/math/trigonometry/less-basic-trigonometry/law-sines-cosines/v/law-of-cosines-example

The law of cosines is

c^2 = a^2 + b^2 - 2 a b cos C