document.write( "Question 1194933: Use a half - angle identity to find the exact value of each expression.\r
\n" ); document.write( "\n" ); document.write( "5) tan 45°\r
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\n" ); document.write( "\n" ); document.write( "7) sin 5π
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\n" ); document.write( "\n" ); document.write( "8.) cos 30°
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Algebra.Com's Answer #827232 by ikleyn(52776) $\"\"$ $\"About$

You can put this solution on YOUR website!
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document.write( "(5)  tan(45°) = 1.   It is a table value,\r\n" );
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document.write( "                     which means that any/every/each student must know the answer from \r\n" );
document.write( "                     the table, without applying half-angle identity or any other identity.\r\n" );
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document.write( "(7)  sin(5π) = 0.   Every student must know it without applying half-angle identity or any other identity.\r\n" );
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document.write( "(8)  cos(30°) = .   It is a table value,\r\n" );
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document.write( "                     which means that any/every/each student must know the answer from \r\n" );
document.write( "                     the table, without applying half-angle identity or any other identity.\r\n" );
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\n" ); document.write( "\n" ); document.write( "May I complete this post by joking ?\r
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\n" ); document.write( "\n" ); document.write( " To deduce / (to derive) the values of given angles using half-angle formulas \r
\n" ); document.write( "\n" ); document.write( " is the same as to deduce multiplication table from the driving rules.\r
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