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# View of /trunk/NationalProblemLibrary/Rochester/setTrig07Identity/p6.pg

Wed Oct 17 17:35:27 2012 UTC (8 months ago) by jj
File size: 998 byte(s)
Took pairs of problems which were exact duplicates except for their tags,
merged tags, and made one point to the other.


    1 ## DESCRIPTION
2 ## Precalculus: Trigonometric Identities
3 ## ENDDESCRIPTION
4
5 ## Tagged by cmd6a 5/11/06
6
7 ## DBsubject('Trigonometry')
8 ## DBchapter('Analytic Trigonometry')
9 ## DBsection('Trigonometric Identities')
10 ## Institution('ASU')
11 ## KEYWORDS('trigonometry','half-angle','precalculus','identities')
12
13 DOCUMENT();        # This should be the first executable line in the problem.
14
16 "PG.pl",
17 "PGbasicmacros.pl",
18 "PGchoicemacros.pl",
20 "PGauxiliaryFunctions.pl",
21 "PGgraphmacros.pl",
22 "PGasu.pl"
23 );
24
25 TEXT(beginproblem());
26
27 $showPartialCorrectAnswers = 1; 28 29 30$a=random(2,8,1);
31
32
34
35
36 $ans1=1/2; 37$ans2=1/2;
38 $ans3=2*$a;
39
40 TEXT(EV2(<<EOT));
41 Use a half angle formula to fill in the blanks in the identity below:
42
43 $BR 44 $$(\cos(a x))^2$$ = 45 \{ans_rule(5) \}+\{ans_rule(5) \} $$\cos($$ \{ans_rule(5) \} $$x )$$ 46 EOT 47 48 ANS(num_cmp($ans1));
49 ANS(num_cmp($ans2)); 50 ANS(num_cmp($ans3));
51
52
53 ENDDOCUMENT();        # This should be the last executable line in the problem.
54