could someone tell me if this problem is correct?

http://i333.photobucket.com/albums/m...g?t=1229051527

Thank you!

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- Dec 11th 2008, 06:13 PMrobasctrigonometry
could someone tell me if this problem is correct?

http://i333.photobucket.com/albums/m...g?t=1229051527

Thank you! - Dec 11th 2008, 06:33 PMSkalkaz
140° ? from where is there this information?

- Dec 11th 2008, 06:39 PMrobasc
since side a = 5.9 and side b = 5.9, the angle of A and B are the same. So I subtracted (20 + 20) degrees from 180 degrees which gave me 140 degrees.

- Dec 11th 2008, 06:54 PMSkalkaz
I see. Following step is unbelievable.

It"s sure that sin(20°)/5.9 < 1 because sin(x)<1 always.

This solution seems me a little confused.