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#1 Re: Help Me ! » how to find sin 5 degrees » 2009-10-18 20:02:40

Thank you for the help!
Actually, I too did the same and got an equation of 3rd power with complex roots :-)
But the problem is, I need this for my daughter who is in class 8 and they haven't learned complex numbers as yet....
I think that the teacher made a mistake in the question paper - she wrote 5 instead of 15 :-)

#2 Help Me ! » how to find sin 5 degrees » 2009-10-18 01:25:38

vishalbhai
Replies: 14

Hello!
Pls. help me find a way to calculate values like sin 5 & cos 10 ( the arguments are in degrees) without using tables or series...Just common formulas from grade 7-8 trignometry!!!

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