[Help please?] Math Question

Turin

Golden Oldie
Golden Oldie
Mar 21, 2004
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0
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LomCN
Hey,

I'm in a very unfortunate position, I remember a few months ago someone else making a similar thread and I never thought I'd be in their position. But here I am, I really hope someone can help me.

A - Level question, looks simple as hell, but I just can't put my finger on it:

In a desert excersize a tank travels x kn on a bearing on 050 (degrees) from a base O then y km on a bearing of 140 (degrees) to a bunker B. Caculate the magnitude and direction of displacement of vector OB.

To make a mathematical model I get this:

untitledjv6.gif


For example's sake, lets assume x = 6 and y = 7. (The first of six variables for each question on the paper)


So in every case, I'm missing two unknowns, making the sine and cosine formulas useless. Maybe I'm missing something with the bearings?

Any help at all, appreciated. Ty in adv.

Turin
 

Turin

Golden Oldie
Golden Oldie
Mar 21, 2004
590
0
103
LomCN
I died of embarrassment today. I went up to my tutor before the lesson and asked him about it, he just smiled and walked away. Then in the middle of the lesson, when it came to the assignment review, he made me stand at the podium in the lecture theatre and asked me to tell everyone how to do the question.

:'( Evil pastered.

I stood there for 15 mins, he wouldn't help me until someone pitied me and shouted out sraight line angle... clocked on then.

Bah, thnks for the input though guys.
Turin

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