C-09-Q154mediumsingle_mcqsec0∘=?\sec 0^\circ = ?sec0∘=?a000b111c∞\infty∞dundefinedব্যাখ্যাSecant is the reciprocal of cosine: sec0∘=1cos0∘=11=1\sec 0^\circ=\dfrac{1}{\cos 0^\circ}=\dfrac{1}{1}=1sec0∘=cos0∘1=11=1.