Simplifying trigonometric functions
- To: mathgroup at smc.vnet.net
- Subject: [mg94662] Simplifying trigonometric functions
- From: Tang <tangwt at msn.com>
- Date: Fri, 19 Dec 2008 07:24:27 -0500 (EST)
Hi, I'm new to Mathematica. How can I define a rule to reduce the following expression from Cos[x] Cos[y]^2 + Sin[y]^2 to operate only on expressions involving y to Cos[x](1+Cos[2y])/2 + (1-Cos[2y])/2 Thanks for the help!