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# View of /trunk/NationalProblemLibrary/Rochester/setTrig07Identity/srw7_1_35.pg

Thu Aug 16 23:07:34 2007 UTC (5 years, 9 months ago) by jj
File size: 1020 byte(s)
Moved problems back into place in the Rochester library, and set up
redirect files from their former locations.


    1 ##DESCRIPTION
2 ## Algebra: Analytic Trigonometry
3 ##ENDDESCRIPTION
4
5 ##KEYWORDS('algebra', 'analytic trigonometry', 'trigonometric identities')
6
7 ## tcao , PAID on 11-24-2003
8
9 ## DBsubject('Trigonometry')
10 ## DBchapter('Analytic Trigonometry')
11 ## DBsection('Trigonometric Identities')
12 ## Date('6/3/2002')
13 ## Author('')
14 ## Institution('')
15 ## TitleText1('Precalculus')
16 ## EditionText1('3')
17 ## AuthorText1('Stewart, Redlin, Watson')
18 ## Section1('7.1')
19 ## Problem1('33')
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 $showPartialCorrectAnswers = 0; 32 33 34 TEXT(EV2(<<EOT)); 35 Simplify and write the trigonometric expression in terms of sine and cosine: 36$BR
37 $$(1-\cos y)(1+\cos y) = (f(y))^2$$
38 $BR 39 $$f(y)=$$ \{ans_rule(10)\}. 40$BR
41 EOT
42
43 $ans1="sin(y)"; 44 45 ANS(fun_cmp($ans1,var=>['y']));
46
47 ENDDOCUMENT();        # This should be the last executable line in the problem.