
[SOLVED] Cosine rule 2
If you could help me in any way it would be great!!! I accidently typed the wrong question!(I sometimes wonder how I got into this maths class=])
this is the right question:
A boat travels 6.3km due north and then turns 17degrees towards the west and travels a further 7.2kms. How far is it from it's initial position?(Headbang)
x^2=6.3^2+7.2^22(6.3)(7.2)cos17
x^2=91.5390.72Xcos17
x^2=91.5386.76
x^2=4.77
x=2.18(Angry)
any help would be great! Thank you for taking the time to help me with my trig h/w!!

I think you should try this... ?!

Hello, xch3m_is_l0v3x!
You didn't make a sketch, did you?
Code:
C * N
\\ :
\ \ 7.2 :
\ \ :
\ \17°:
\ \ :
\ * B
\ 
\ 
\  6.3
\ 
\
* A
Get it? . . . You should have used: