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[sqrt(97)3*cos^(-1)(cos(7 pi)/(6))," an ...

[sqrt(97)3*cos^(-1)(cos(7 pi)/(6))," an "417" aptar "(4)/(8):quad " [NCERT EXERCISE] "],[[" (a) "(7 pi)/(6)," (b) "(5 pi)/(6)," (c) "(pi)/(3)," (d) "(pi)/(6)]]

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