--- trunk/NationalProblemLibrary/Michigan/Chap16Sec4/Q21.pg	2012/05/04 19:04:44	2970
+++ trunk/NationalProblemLibrary/Michigan/Chap16Sec4/Q21.pg	2012/05/04 19:39:16	2971
@@ -38,6 +38,7 @@
 
 Context("Numeric");
 Context()->variables->are( r=>'Real', t=>'Real' );
+Context()->variables->set( t=>{limits=>[-pi()/4,pi()/4]} );
 $showPartialCorrectAnswers = 1;
 
 $ao2 = random(1,5,1);
@@ -78,14 +79,14 @@
 END_TEXT
 Context()->normalStrings;
 
-ANS($t0->cmp() );
-ANS($t1->cmp() );
-ANS($r0->cmp() );
-ANS($r1->cmp() );
-ANS($rvar->cmp() );
-ANS($integr->cmp() );
-ANS($antide->cmp() );
-ANS($result->cmp() );
+ANS( $t0->cmp() );
+ANS( $t1->cmp() );
+ANS( $r0->cmp() );
+ANS( $r1->cmp() );
+ANS( $rvar->cmp() );
+ANS( $integr->cmp() );
+ANS( $antide->cmp() );
+ANS( $result->cmp() );
 
 Context()->texStrings;
 SOLUTION(EV3(<<'END_SOLUTION'));
@@ -118,6 +119,6 @@
 END_SOLUTION
 Context()->normalStrings;
 
+COMMENT('Uses MathObjects');
 
-COMMENT('MathObject version');
 ENDDOCUMENT();