First off, I was just moved up a grade (about 2 week ago) and the class is studying trigonometry.(adsbygoogle = window.adsbygoogle || []).push({});

1. The problem statement, all variables and given/known data

I have a triangle:

Hyp = 10m

Opp = 4m

Adj= Unknown

Feta = Unknown

And I need to find feta.

2. Relevant equations

???

3. The attempt at a solution

Well, I have tried a lot of random things lol.

E.g: sin-1 (10x4)

Well, thats actually about it.

I also have another question. Exactly from the revision sheet.

By using a radar beam. an observer at A determinses that a plane at B is 2000 metres away (AB=2000) Use the information given to calculate the height of the plane above the horizontal [tex]\overline AC[/tex] The angle is 50 degrees. I know the answer is 2000xsin 50, but how do I know t is sin? The teacher gave me the answer, but I dunno how she came up with sin :(

Please help,

BP

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# Homework Help: Trigonometry Triangle Help

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