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Prove that: tg20.tg40.tg60.tg80 = 3

Trigonometry equalities, inequalities and expressions - sin, cos, tan, cot
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Prove that: tg20.tg40.tg60.tg80 = 3

Postby Math Tutor » Mon Dec 21, 2009 11:50 am

Prove the that
tg20.tg40.tg60.tg80 = 3
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Re: Prove that: tg20.tg40.tg60.tg80 = 3

Postby mrmohamed » Sat Jan 09, 2010 5:53 am

teacher wrote:Prove the that
tg20.tg40.tg60.tg80 = 3

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