The principal solution `cosx=-(1)/(sqrt(2))` isA. `(pi)/(4)`B. `(3pi)/ – InterviewSolution

1.	The principal solution `cosx=-(1)/(sqrt(2))` isA. `(pi)/(4)`B. `(3pi)/(4)`C. `(7pi)/(4)`D. `-(pi)/(4)`
Answer» Correct Answer - B

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