document.write( "Question 454762: Please simplify each trigonometric expression:
\n" ); document.write( "1. sin(40°) cos (50°)+cos (40°) sin (50°)
\n" ); document.write( "2. cos 105º cos 15º – sin 105º sin 15º \n" ); document.write( "
Algebra.Com's Answer #312516 by stanbon(75887)\"\" \"About 
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Please simplify each trigonometric expression:
\n" ); document.write( "1. sin(40°) cos (50°)+cos (40°) sin (50°)
\n" ); document.write( "---
\n" ); document.write( "= sin(40+50)
\n" ); document.write( "= sin 90
\n" ); document.write( "= 1
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\n" ); document.write( "\n" ); document.write( "2. cos 105º cos 15º – sin 105º sin 15º
\n" ); document.write( "= cos(105-15)
\n" ); document.write( "= cos(90)
\n" ); document.write( "= 0
\n" ); document.write( "============
\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
\n" ); document.write( " \n" ); document.write( "
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