D Find the principal solutions of theequationsCosi 7 – InterviewSolution

1.

D Find the principal solutions of theequationsCosi 7

Answer»

cosx=1/2x=cos^-1(1/2)x=cos^-1(cosπ/3)

Here both cancels with each other because π/3 belongs to [0,π]

Thus x=π/3

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