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

Thu Jun 29 18:44:08 2006 UTC (6 years, 10 months ago) by jj
File size: 995 byte(s)
Fixed tags.


    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
23 "PG.pl",
24 "PGbasicmacros.pl",
25 "PGchoicemacros.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.