I'm not sure what formula is needed to answer the attached question. Maybe the half angle formulae?

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- January 25th 2010, 06:22 AMStuck ManOne angle of triangle
I'm not sure what formula is needed to answer the attached question. Maybe the half angle formulae?

- January 25th 2010, 06:35 AMGrandad
- January 25th 2010, 06:38 AMSudharaka
Grandad had answered the question by the time I written my reply. So I removed it.

- January 25th 2010, 06:56 AMHallsofIvy
Dontcha just hate when he does that!

- January 25th 2010, 06:58 AMStuck Man
I found the solution by solving sin C and cos C. Thanks.