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January 26, 2015

January 26, 2015

Posted by **vikrant sharma** on Thursday, May 15, 2008 at 1:47pm.

cotxcot2x-cot2xcot3x-cot3xcotx=1

- mathamatics 10+1 -
**Reiny**, Thursday, May 15, 2008 at 6:50pmI picked a random angle (20º) and tested your "identity".

the left side was equal to 1

when you typed

cotxcot2x ...

did you mean

cotxcot(2x)... or cotxcot^{2}x ... ?

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