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#1
12-06-2007, 04:56 AM
 xtmilx Junior Member Join Date: Dec 2007 Posts: 3
Trig equation

For the interval from -π to π, solve cosx + sinx = 1

any help on this question especially a step by step procedure would be greatly appreciated
#2
01-01-2008, 05:45 PM
 HallsofIvy Senior Member Join Date: Oct 2006 Posts: 464

Quote:
 Originally Posted by xtmilx For the interval from -π to π, solve cosx + sinx = 1 any help on this question especially a step by step procedure would be greatly appreciated
Have you tried ANYTHING yourself? I guarentee you, looking at a math problem and saying "I don't know how to do this" without TRYING something is a sure way to fail! You know that cos^2(x)+ sin^2(x)= 1. Can you use those two equations together? If cos(x)+ sin(x)= 1, what is (cos(x)+ sin(x))^2?

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