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Dorothea D. Bone, SINE AND COSINE FUNCTIONS WITH A CALCULATOR, The Mathematics Teacher, Vol. 73, No. 7 (October 1980), pp. 521-524, 529 ...
Anna F. DeJarnette, Students' Conceptions of Sine and Cosine Functions When Representing Periodic Motion in a Visual Programming Environment, Journal for Research in Mathematics Education, Vol. 49, No ...
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