I need help with this equation:

sin(x)cos(x)tan(x)=1-cos^2(x)

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- April 24th 2010, 08:51 PMmarekdSimple Trig Identity - help
I need help with this equation:

sin(x)cos(x)tan(x)=1-cos^2(x) - April 24th 2010, 08:58 PMmathaddict
- April 24th 2010, 08:58 PMmybrohshi5
Hi :)

substitute for tanx.

This will give you

as you can see the cosx will cancel on the left side of the equal sign.

This leaves you with

and you know the trig identity of

Does that clear everything up for you? - April 24th 2010, 09:05 PMmarekd
Helps a lot. Thanks you guys