7-4 - 74.notebook November18,2010...

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7­4.notebook 1 November 18, 2010 Mar 10­10:45 AM 7­4 Evaluating and graphing sin θ and cos θ Reference angles ­ always acute with x­axis. quadrant I : use as is quadrant II and III : use 180 0 quadrant IV : use 360 0 Mar 10­10:48 AM Exs. sin 150 0 sin 240 0 cos 330 0 cos 225 0
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7­4.notebook 2 November 18, 2010 Mar 10­10:51 AM Evaluate with a calculator to 4 decimal places. sin 178 0 cos 178 0 sin (­50 0 ) cos ­3.4 h.w. p.278 1­9 Mar 10­10:53 AM Evaluating sin θ and cos θ using tables. sin θ
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This note was uploaded on 04/22/2011 for the course MATH 212 taught by Professor Owens during the Winter '07 term at Grand Valley State University.

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7-4 - 74.notebook November18,2010...

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