document.write( "Question 431468: Use the sum angle formula to simplify cos(x + 270○) \n" ); document.write( "

Algebra.Com's Answer #299430 by Gogonati(855) $\"\"$ $\"About$

You can put this solution on YOUR website!
Solution:We write:cos(270+x)=cos[180+(90+x)]=-cos(90+x)=sinx. \n" ); document.write( "

\n" );