Help me please (The Cosine Law)

Question

mindblast3r · Answer

@study_buddy99

study_buddy99 · Answer

what is it?

mindblast3r · Answer

let me write the question one sec.

mindblast3r · Answer

The expedition team plan a final practice run to test the range of their communication equipment. One member travels a distance of 12 km due north. Another team member heads 50° east of north and travels a distance of 10 km. How far apart are the two team members? Round your answer to the nearest tenth of a kilometer.

mindblast3r · Answer

is that how you would draw the triangle? I'm not sure

mindblast3r · Answer

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mindblast3r · Answer

you know the consine law right?

mindblast3r · Answer

cosine*

study_buddy99 · Answer

I ned to go look at my notes really quick

mindblast3r · Answer

I can tell you the formula if you want

mindblast3r · Answer

The answer is 9.5 km

study_buddy99 · Answer

okay... yeah what's the formula?

mindblast3r · Answer

I don't know, I'm not getting the correct answer though... so I don't know

mindblast3r · Answer

I don't know if i'm even drawing the correct triangle

mindblast3r · Answer

sec

mindblast3r · Answer

$$a^2=b ^{2}+c^{2}-2bc \times \cos A$$

jiteshmeghwal9 · Answer

$$cos50^0= \frac{12^2+10^2+x^2}{2*12*10} $$

jiteshmeghwal9 · Answer

Solve for x

mindblast3r · Answer

Did I draw the triangle correctly though?

mindblast3r · Answer

@jiteshmeghwal9

mindblast3r · Answer

ohhhhhhhhhhhh, it makes sense now!!

mindblast3r · Answer

Just not sure if i drew the triangle correctly though

jiteshmeghwal9 · Answer

U drew the triangle correctly

mindblast3r · Answer

you sure? I think it's like this

mindblast3r · Answer

|dw:1474259633700:dw|

mindblast3r · Answer

i don't know which one is right

mindblast3r · Answer

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