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# Maths C3 Edexcel

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1. If x=acosec, y=bcot and z=csec
Simplify x/x^2-a^2
I've got to cosec/acot^2 (not sure if this is right) but don't know where to go from here. Thanks!
2. Where are the arguments? The cosec of what?
3. Let's assume the arguments are , what you have done is correct, but you can write in a nicer form if you express it in terms of sin and cos and simplify.
4. How is the a from the bottom cancelled out?
5. (Original post by Jamesphillll)
How is the a from the bottom cancelled out?
Oh, it's not, just a typo.
6. (Original post by NotNotBatman)
Oh, it's not, just a typo.
Still unsure of what to do from here :/
7. (Original post by Jamesphillll)
Still unsure of what to do from here :/
I'm sure you could leave it, but if you want to simplify it, note that

Now, write and in terms of and
8. (Original post by NotNotBatman)
I'm sure you could leave it, but if you want to simplify it, note that

Now, write and in terms of and
Thanks, that makes more sense now

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