On cosine and sine functional equations
Annales Polonici Mathematici, Tome 20 (1968) no. 3, pp. 245-249
@article{10_4064_ap_20_3_245_249,
author = {Pl. Kannappan},
title = {On cosine and sine functional equations},
journal = {Annales Polonici Mathematici},
pages = {245--249},
year = {1968},
volume = {20},
number = {3},
doi = {10.4064/ap-20-3-245-249},
language = {en},
url = {http://geodesic.mathdoc.fr/articles/10.4064/ap-20-3-245-249/}
}
Pl. Kannappan. On cosine and sine functional equations. Annales Polonici Mathematici, Tome 20 (1968) no. 3, pp. 245-249. doi: 10.4064/ap-20-3-245-249
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