Please help. Giving a medal for the best answer. Island A is 240 miles from island B. A ship captain travels 220 miles from island A and then finds that he is off course and 160 miles from island B. What angle, in degrees, must he turn through to head straight for island B ? Round the answer to two decimal places. (Hint: Be careful to properly identify which angle is the turning angle.)

Question

mrnood · Answer

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anonymous · Answer

how do I find the angle though ?

mrnood · Answer

you need to use the sine rule and/or cosine rule to find the angle INSIDE the triangle 
Then the angle outside is the supplement of the inside angle.

The point of this question is to use the properties of triangles that you are learning

mrnood · Answer

http://en.wikipedia.org/wiki/Law_of_cosines

anonymous · Answer

thanks I got it now

mrnood · Answer

Thx 4 medal!