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Since it's in equilibrium:Q1(d)
HELP ME OUT!
Upward forces = Downward forces
and
Forces towards right ride = Forces towards left side.
Split T1 and T2 into their vertical and horizontal components. The use the information above to obtain 2 equations:
T1sin50 + T2sin40 = 7.5
and
T1cos50 - T2cos40 = 0
Solve them simultaneously and get your answer.