document.write( "Question 935737: What is the exact value of cos205 degrees? \n" ); document.write( "
Algebra.Com's Answer #569018 by MathLover1(20855)\"\" \"About 
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\"205\" degrees is \"180\" degrees + \"25\" degrees, we can write cos as \"cos%28205%29=cos%28180%29cos%2825%29\"\r
\n" ); document.write( "\n" ); document.write( "\"cos%28205%29=cos%28180%29cos%2825%29=-1%2A0.906307787=-0.906307787\"\r
\n" ); document.write( "\n" ); document.write( "or, we can use only \"-cos%2825%29\" (it is \"cos%2825%29\" in III quadrant because \"205\" degrees angle is in that quadrant)\r
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\n" ); document.write( "\n" ); document.write( "\"cos%28205%29=-cos%2825%29=-0.906307787\"
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