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November 1st, 2018, 09:35 AM   #1
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Help with High School Maths hard question

Please help!
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November 1st, 2018, 11:04 AM   #2
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Do you know the cosine rule and the sine rule?
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November 1st, 2018, 12:09 PM   #3
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Angles15.JPG
The diagram above gives the angles, so you just need to show the remaining lengths are correct.
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November 1st, 2018, 01:29 PM   #4
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How did you find that you should use those angles and triangles?
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November 1st, 2018, 01:53 PM   #5
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Quote:
Originally Posted by v8archie View Post
Do you know the cosine rule and the sine rule?
yes
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November 1st, 2018, 02:04 PM   #6
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Well you can use them to find all lengths and angles in the figue. I'd start with the cosine rule on the triangle with sides $\sqrt3$ and $1$.
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November 1st, 2018, 02:10 PM   #7
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I have done everything that I can I have done law of cosines and law of sines but I really can't find the answer could you please tell me the answer to the question.
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November 1st, 2018, 04:01 PM   #8
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What did you get?
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November 2nd, 2018, 10:09 AM   #9
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Quote:
Originally Posted by Jeff Shreeves View Post
How did you find that you should use those angles and triangles?
As the diagram was accurate, the angles could be measured directly, albeit approximately. The extra triangles were then obtained by inspection.
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November 2nd, 2018, 11:27 AM   #10
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Archie TOLD you how.

Added hint:
after doing what Archie suggested, you'll have the hypotenuse's length;
next calculate the missing leg's length (should get ~1.93164),
next calculate the right triangle's angles...

It is not easy to help you: your damn diagram is not labelled
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