12-06-2007, 04:56 AM
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Junior Member
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Join Date: Dec 2007
Posts: 3
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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
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01-01-2008, 05:45 PM
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Senior Member
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Join Date: Oct 2006
Posts: 464
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Quote:
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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
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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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