Problems In Three Dimensions
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\(\rm{B}\) and \(\rm{C}\) are two points 600 m apart on the ground and \(\rm{A}\) is the top of a tower. \(\angle {\rm{ABC}}={\rm{60}}^\circ \) and \(\angle {\rm{ACB}}={\rm{40}}^\circ \). The elevation \(\angle {\rm{ABD}}={\rm{5}}^\circ \). Find the height \(\rm{AD}\) of the tower.
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