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## Homework Statement

Hey everyone, I'm horrible at physics so bear with me if it's a really easy question.

I was working a problem out, where I assigned my x-axis with cosine, and my y-axis with sine, like how I always thought it should be.

However, in the solution, they assigned sine for the x-axis and cosine for the y-axis and therefore my results were backwards for T1 and T2. Was this a mistake in the book or in my understanding? If it's me, can someone please explain why the x-axis is given sine and the y-axis is given cosine?

Thanks. I also provided a picture of the problem.

## Homework Equations

## The Attempt at a Solution

Like I said I attempted the problem and I got the correct answers except my T1 and my T2 are mixed up because I put my x-axis as cos and my y-axis as sine, while the book did opposite. [/B]