T1 cos 70 - T2 cos 78 = 0 (no horizontal force)
T1 sin 70 + T2 sin 78 = 450 (weight = total force up)
solve 2 equations, two unknowns.
A box weighing 450 N is hanging from two chains attached to an overhead beam at angles of 70 degrees and 78 degrees to the horizontal. Determine the tensions in the chains.
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