sqrt(4 - (2sinx)^2)2cosx = 4cos^2(x)

There are steps in the middle (obviously) but I can't figure them out (Headbang)

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- February 28th 2009, 11:09 AMTYTYhow does this happen?
sqrt(4 - (2sinx)^2)2cosx = 4cos^2(x)

There are steps in the middle (obviously) but I can't figure them out (Headbang) - February 28th 2009, 11:51 AMReckoner
- February 28th 2009, 11:54 AMTYTY
This is very helpful and I appreciate it