Question 1129814


simplify 

{{{(2sin^2(a)-1)/(sin(a)+cos(a))}}}


{{{(sin^2(a)+sin^2(a)-1)/(sin(a)+cos(a))}}}


{{{(sin^2(a)-(1-sin^2(a)))/(sin(a)+cos(a))}}}


{{{(sin^2(a)-cos^2(a))/(sin(a)+cos(a))}}}


{{{((sin(a)-cos(a))(cross((sin(a)+cos(a)))))/cross((sin(a)+cos(a)))}}}


{{{sin(a)-cos(a)}}}