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if abs({:(sinalpha, cosbeta), (cosalpha,...

if `abs({:(sinalpha, cosbeta), (cosalpha, sinbeta):})=1/2`, where `alpha, beta` are acute angles, then find the value of `alpha+beta`. a) `pi/3` b) `(2pi)/3``c) `pi/2` d) `pi/4`

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