Solving an Internal Indeterminate Truss Problem

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The discussion revolves around solving an internal indeterminate truss problem, where the user attempted to find the forces by removing a redundant member, AC. After calculating the real force and applying a virtual unit force at AC, the user obtained a result of 2.28, while the expected answer is 1.62. Despite multiple checks of their work, the user is unable to identify the mistake and seeks assistance. There is a concern about the clarity of the question and whether it is posted in the appropriate section. The user is looking for guidance to resolve the discrepancy in their calculations.
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Homework Statement


In this problem , it's a Internal Indeterminate truss .

Homework Equations

The Attempt at a Solution


So , I remove one of the redundant member , AC and solve the problem .
For the first part , I found the real force first . for the second part , I apply the virtual unit force at AC ...I gt my ans = 2.28 , but the ans given is 1.62 . I have checked thru my working many time s, yet I still can't find my mistake , can someone help please??
 

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Is my question not clear enough or i am posting at the wrong section ?
 

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