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"A Trig-Of-Trig Inequality: 11309."
Roman Witula et al. (2009)
- Roman Witula, Damian Slota, Arman Darbinyan, David Borwein:
A Trig-Of-Trig Inequality: 11309. Am. Math. Mon. 116(2): 184-185 (2009)
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