Sentence:  If it is assumed that the formula given by Lodge of * * f , <WSD>cosec</WSD> 2lc applies , the pressure difference along the major axes can be calculated from the angle of inclination of the major axis , and from this the interfacial tension can be calculated . 
Meaning of the word marked with <WSD> tags:  ratio of the hypotenuse to the opposite side of a right-angled triangle