document.write( "Question 1106079: If sin A = 3/5 and cos B = 12/13, and A and B are both positive acute angles, find the value of cos (A+B). \n" ); document.write( "
Algebra.Com's Answer #721007 by ikleyn(52852)\"\" \"About 
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\n" ); document.write( "Read the lesson\r
\n" ); document.write( "\n" ); document.write( "    - Evaluating trigonometric expressions, Problem 1\r
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\n" ); document.write( "\n" ); document.write( "It is your sample: very similar problem was solved there.\r
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\n" ); document.write( "\n" ); document.write( "After reading, solve your problem in the same way.\r
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