View of /trunk/NationalProblemLibrary/ASU-topics/setTrigIdentities/srw7_2_9.pg

    1 ##DESCRIPTION
    2 ## Precalculus, Trigonometric Identities
    3 ##ENDDESCRIPTION
    4 
    5 ## KEYWORDS('precalculus','trigonometry','identities')
    6 ## Tagged by skm9b
    7 
    8 ## DBsubject('Trigonometry')
    9 ## DBchapter('Analytic Trigonometry')
   10 ## DBsection('Trigonometric Identities')
   11 ## Date('')
   12 ## Author('')
   13 ## Institution('ASU')
   14 ## TitleText1('')
   15 ## EditionText1('')
   16 ## AuthorText1('')
   17 ## Section1('')
   18 ## Problem1('')
   19 
   20 DOCUMENT();        # This should be the first executable line in the problem.
   21 
   22 loadMacros(
   23 "PG.pl",
   24 "PGbasicmacros.pl",
   25 "PGchoicemacros.pl",
   26 "PGanswermacros.pl",
   27 "PGauxiliaryFunctions.pl"
   28 );
   29 
   30 TEXT(beginproblem());
   31 $showPartialCorrectAnswers = 1;
   32 
   33 
   34 TEXT(EV2(<<EOT));
   35 Use an addition or subtraction formula to find the exact value of
   36 \(\cos (-\frac{\pi}{12})=\frac{\sqrt{A}(\sqrt{B}+1)}{4}\).
   37 $BR
   38 \(A=\) \{ans_rule(10)\};
   39 $BR
   40 \(B=\) \{ans_rule(10)\}.
   41 $BR
   42 EOT
   43 
   44 $ans1=2;
   45 $ans2=3;
   46 
   47 ANS(num_cmp($ans1));
   48 ANS(num_cmp($ans2));
   49 
   50 ENDDOCUMENT();        # This should be the last executable line in the problem.