document.write( "Question 1067547: What's a simple way the Half Angle and Double Angle Formulas can be used to solve a problem? Can you give me a quick example problem with maybe a illustration of the circle? Thanks. \n" ); document.write( "
Algebra.Com's Answer #682693 by ikleyn(52909)\"\" \"About 
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\n" ); document.write( "See the lessons\r
\n" ); document.write( "\n" ); document.write( "    - Trigonometric functions of multiply argument\r
\n" ); document.write( "\n" ); document.write( "    - Trigonometric functions of multiply argument - Examples \r
\n" ); document.write( "\n" ); document.write( "    - Trigonometric functions of half argument\r
\n" ); document.write( "\n" ); document.write( "    - Trigonometric functions of half argument - Examples\r
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