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जी1. ८08 | ०० 2276 |
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Answer» Principal value branch of Cos^-1 is [ 0 , π] We know that , Cos ( 2π + θ)= cosθ Cos^-1 ( Cos13π/6) = Cos^-1[ Cos ( 2π + π/6 ) ] Cos^-1 ( Cos π/6 ) =π/6 |
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