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# Higher Maths? watch

1. Please show explain the working I have no clue how to start this question?

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2. (Original post by Hollybollybee109)

Please show explain the working I have no clue how to start this question?

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Try sketching yourself a rough diagram to see what's going on!

Where is the centre of that circle? How does it relate to the point you're given?
3. (Original post by Hollybollybee109)

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Now join the point A with the centre of the circle and you have a nice right angled triangle you can use pythagoras on - remember you know the distance between the centre and the point (from the distance between two points formula) and you know the radius.

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