View of /trunk/NationalProblemLibrary/ASU-topics/setTrigIdentities/srw7_1_39.pg

    1 ##DESCRIPTION
    2 ## Simplify expressions using trigonometric identities
    3 ##ENDDESCRIPTION
    4 
    5 ## KEYWORDS('trigonometry')
    6 ## Tagged by skm9b
    7 
    8 ## DBsubject('Trigonometry')
    9 ## DBchapter('Analytic Trigonometry')
   10 ## DBsection('Trigonometric Identities')
   11 ## Date('')
   12 ## Author('')
   13 ## Institution('')
   14 ## TitleText1('Precalculus')
   15 ## EditionText1('3')
   16 ## AuthorText1('Stewart, Redlin, Watson')
   17 ## Section1('7.1')
   18 ## Problem1('37')
   19 
   20 
   21 DOCUMENT();        # This should be the first executable line in the problem.
   22 
   23 loadMacros(
   24 "PG.pl",
   25 "PGbasicmacros.pl",
   26 "PGchoicemacros.pl",
   27 "PGanswermacros.pl",
   28 "PGauxiliaryFunctions.pl"
   29 );
   30 
   31 TEXT(beginproblem());
   32 $showPartialCorrectAnswers = 0;
   33 
   34 
   35 TEXT(EV2(<<EOT));
   36 Simplify and write the trigonometric expression in terms of sine and cosine:
   37 
   38 \[ \frac{\sec t -\cos t}{\sec t}= (f(t))^2 \]
   39 
   40 \(f(t)=\) \{ans_rule(10)\}.
   41 EOT
   42 
   43 $ans1="sin(t)";
   44 
   45 ANS(fun_cmp($ans1,var=>['t']));
   46 
   47 ENDDOCUMENT();        # This should be the last executable line in the problem.