422 prompts matching "Deriving a multiple angle formula from de Moivre's theorem"
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Common Mistakes: Rationalising a denominator of the form root a over root b
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Spot My Mistake: Simplifying the denominator once the conjugate has been used
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Common Mistakes: Rationalising when both terms of the denominator are surds
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Worked Example: Squaring both sides safely when solving a surd equation
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Explain Back: A binary operation defined on the integers
I have just studied a binary operation defined on the integers in my SS1 Further Mathemati
Spot My Mistake: A binary operation defined on a set of three elements
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Final Revision: Deciding whether a given rule really is a binary operation
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Worked Example: Testing the even numbers for closure under addition
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Explain Back: Testing the integers for closure under division
I have just studied testing the integers for closure under division in my SS1 Further Math
WAEC Prep: A set closed under one operation but not another
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Common Mistakes: Closure on a set of three elements under a stated rule
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WAEC Prep: The inverse of the identity element itself
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Show All Working: An element with no inverse under a given operation
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Final Revision: Identity and inverse together, and what they give the set
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WAEC Prep: Applying two index laws inside one expression
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Common Mistakes: Why the index laws need the bases to match
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Final Revision: Evaluating a numerical expression using the index laws
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Worked Example: Rewriting a negative index as a fraction
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Explain Back: A fractional index with a numerator above one
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Spot My Mistake: A negative fractional index
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