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14. Two mark exercise problems IV

Find the value of the following:

(i)

{(\frac{\cos 47 °}{\sin 43 °})}^{2} + {(\frac{\sin 72 °}{\cos 18 °})}^{2} - 2 \cos^{2} 45 °

\(=\)

(ii)

(\frac{\cos 70 °}{\sin 20 °}) + (\frac{\cos 59 °}{\sin 31 °}) + \frac{\cos θ}{\sin (90 ° - θ)} - 8 \cos^{2} 60 °

\(=\)

(iii)

\tan 15 ° \tan 30 ° \tan 45 ° \tan 60 ° \tan 75 °

\(=\)

Did you find an error?