cosine function

Articles containing keyword "cosine function":

JMI-06-63 » A simple proof of Oppenheim's double inequality relating to the cosine and sine functions (12/2012)

Articles containing keyword "Oppenheim's double inequality":

JMI-06-63 » A simple proof of Oppenheim's double inequality relating to the cosine and sine functions (12/2012)
JMI-10-33 » A Sharp double inequality involving trigonometric functions and its applications (06/2016)