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# DIhedral Group/Cosets question watch

1. Okay, so i've managed to answer part a of the question however part b is confusing me...
the part with the cosets?? How do i go abouts finding these cosets, it'd be very much appreciated if someone could show me an example of how to find one of the cosets...cheers thanks for any help !

@Zacken
2. @zacken

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3. (Original post by maths10101)
Okay, so i've managed to answer part a of the question however part b is confusing me...
the part with the cosets?? How do i go abouts finding these cosets, it'd be very much appreciated if someone could show me an example of how to find one of the cosets...cheers thanks for any help !

@Zacken
For each , your group, you need to find i.e. you form a set where you have composed with every element in so each coset will have the same number of elements as .

Not all of the cosets will be distinct. I think that the most efficient method to find the distinct cosets is to start with a where , then repeat that process until the cosets start to repeat.
4. Ahh cool, I'll give that a go now mate

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5. Thanks !

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