document.write( "Question 963951: I have to verify each trig identity. Will you show the steps to please.\r
\n" ); document.write( "\n" ); document.write( "1) ((tan(A+B)-tanB)/(1+tan(A+B)tanB))= tanA\r
\n" ); document.write( "\n" ); document.write( "2) sin^3ø+cos^3ø+sinøcos^2ø+sin2øcosø=sinøcosø\r
\n" ); document.write( "\n" ); document.write( "3) Also, express tan^2x-sec^2x in terms of sinx and cosx, and simplify. \n" ); document.write( "
Algebra.Com's Answer #588911 by Murthy(22)\"\" \"About 
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\n" ); document.write( "1.
\n" ); document.write( "((((tanA+tanB)/(1-tanAtanB))-tanB)/(1+((tanA+tanB)/(1-tanAtanB)).tanB))\r
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\n" ); document.write( "\n" ); document.write( "= ((((tanA+tanB-tanB+tanA〖tan〗^2 B)/(1-tanAtanB)))/(((1-tanAtanB+tanAtanB+ 〖tan〗^2 B )/(1-tanAtanB)) ))\r
\n" ); document.write( "\n" ); document.write( "= ((((tanA+tanB-tanB+tanA〖tan〗^2 B)/(1-tanAtanB)))/(((1-tanAtanB+tanAtanB+ 〖tan〗^2 B )/(1-tanAtanB)) ))
\n" ); document.write( "((tanA+tanA〖tan〗^2 B)/(1+ 〖tan〗^2 B))
\n" ); document.write( "((tanA(1+〖tan〗^2 B))/(1+ 〖tan〗^2 B))
\n" ); document.write( " = tanA
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