Re: Wrong Simplify[] Answer for Simplify[Cos[x]^4-Sin[x]^4]?
- To: mathgroup at smc.vnet.net
- Subject: [mg104416] Re: Wrong Simplify[] Answer for Simplify[Cos[x]^4-Sin[x]^4]?
- From: CuppoJava <patrickli_2001 at hotmail.com>
- Date: Sat, 31 Oct 2009 01:50:18 -0500 (EST)
- References: <hce437$r4t$1@smc.vnet.net>
cos(x)^4 - sin(x)^4 = (cos(x)^2 - sin(x)^2)(cos(x)^2 + sin(x)^2) hope this helps -Patrick