document.write( "Question 442738: Use a sum or difference formula to find the exact value of the following.
\n" );
document.write( "sin(190°)cos(10°)-cos(190°)sin(10°)=\r
\n" );
document.write( "\n" );
document.write( "I'm so comfused any help would be apprciated. Thanks \n" );
document.write( "
Algebra.Com's Answer #305435 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! Use a sum or difference formula to find the exact value of the following. \n" ); document.write( "sin(190°)cos(10°)-cos(190°)sin(10°)= \n" ); document.write( "----------------------- \n" ); document.write( "sin(190) = sin(180+10) = sin(180)cos(10)+cos(180)sin(10) = 0-sin(10) \n" ); document.write( "------------------------- \n" ); document.write( "cos(190) = cos(180+10) = cos(180)cos(10)-sin(180)sin(10) = -cos(10)-0 \n" ); document.write( "------------------------------------------ \n" ); document.write( "Put those values in for sin(190) and cos(190) to get: \n" ); document.write( "= (-sin(10)(cos(10)) -(-cos(10))(sin(10)) \n" ); document.write( "----- \n" ); document.write( "= 0 \n" ); document.write( "==================== \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( " \n" ); document.write( " |