document.write( "Question 448794: Use the addition identity to find the exact value for sin 105°. Show the work. \n" ); document.write( "
Algebra.Com's Answer #309394 by lwsshak3(11628)\"\" \"About 
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Use the addition identity to find the exact value for sin 105°. Show the work.
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\n" ); document.write( "Addition formula for sin: sin(s+t)=sin s cos t+cos s sin t
\n" ); document.write( "For given problem:
\n" ); document.write( "sin 105º=sin(45+60)=sin 45 cos60+ cos 45 sin 60
\n" ); document.write( "=√2/2*1/2+√2/2*√3/2
\n" ); document.write( "=√2/4+√6/4
\n" ); document.write( "=(√2+√6)/4 (ans)
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