document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1155615>Question 1155615</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Evaluate the expression under the given conditions.<BR>\n" );
document.write( "cos(theta-psi); cos(theta)= 5/13, theta in Quadrant IV, tan(psi) = -sqrt(3), psi in Quadrant II </SPAN>\n" );
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document.write( "cos(theta)=5/13 in quadrant IV --> sin(theta) = -12/13.<br><BR>\n" );
document.write( "tan(psi) = -sqrt(3) in quadrant II --> sin(psi) = sqrt(3)/2, cos(psi) = -1/2.<br><BR>\n" );
document.write( "cos(A-B) = cos(A)*cos(B)+sin(A)*sin(B)<br><BR>\n" );
document.write( "Plug in the numbers and do the calculation.<br><BR>\n" );
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