Evaluate each of the following:(i) cos-1cos-π4(ii) cos-1cos5π4(iii) – InterviewSolution

1.	Evaluate each of the following:(i) cos-1cos-π4(ii) cos-1cos5π4(iii) cos-1cos4π3(iv) cos-1cos13π6 (v) cos-1cos3(vi) cos-1cos4(vii) cos-1cos5(viii) cos-1cos12
Answer» Evaluate each of the following: (i) $\cos^{- 1} \{\cos (- \frac{π}{4})\}$ (ii) $\cos^{- 1} \{\cos \frac{5 π}{4}\}$ (iii) $\cos^{- 1} \{\cos (\frac{4 π}{3})\}$ (iv) $\cos^{- 1} (\cos \frac{13 π}{6})$ (v) $\cos^{- 1} (\cos 3)$ (vi) $\cos^{- 1} (\cos 4)$ (vii) $\cos^{- 1} (\cos 5)$ (viii) $\cos^{- 1} (\cos 12)$

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