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## Homework Statement

A 50 N sign is suspended by two cables that make angles of 25 degrees and 70 degrees with the horizontal. Determine the tension in each cable.

## Homework Equations

Cosine law, sine law, or trig

## The Attempt at a Solution

I believe that the teacher's answer is wrong. She did it the same way as the following person:

I did it with the exact same diagram, same angles, but instead of using sine and cosine law, I just used normal trig and divided the tension in half for the triangle's vertical component, resulting in a different answer for the tensions.

This leads me to the conclusion that both answers are wrong, because you cannot just assume there is a 90 degree angle for where the tension hits the horizontal.

Is this assumption correct, and can I have a proper way to do this, with a proper answer?