Answer:
The answer is "undefined, 1, undefined, undefined, and -1".
Step-by-step explanation:
Finding expression:
[tex]i) \csc(0) = \ cosec 0^{\circ} \\\\= \frac{1}{sin 0^{\circ}}\\\\= \frac{1}{0} \ \\\\[/tex]undefined
[tex]ii) \csc (\frac{\pi}{2})\\\\= cosec \frac{\pi}{2}\\\\= cosec \ 90^{\circ}\\\\= \frac{1}{\sin \ 90^{\circ}}\\\\= \frac{1}{1} \\\\=1\\[/tex]
[tex]iii) \sec \frac{\pi}{2} \\\\= sec \ 90^{\circ}\\\\= \frac{1}{\cos 90^{\circ}}\\\\= \frac{1}{0} \\[/tex] undefined
[tex]iv) \csc(pi)\\\\= \ cosec (180^{\circ})\\\\= \frac{1}{\sin 180^{\circ}}\\\\= \frac{1}{0}\\[/tex]undefined
[tex]v) sec (\pi) \\\\=\frac{1}{\cos 180^{\circ}}\\\\= \frac{1}{-1}\\\\= -1[/tex]
