674 prompts matching "Expanding cos of 3 theta using de Moivre's theorem"
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Worked Example: Squaring both sides safely when solving a surd equation
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Practice: Solving an equation with a surd on each side
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WAEC Prep: Equating the rational and the irrational parts of an equation
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Explain Back: A binary operation defined on the integers
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WAEC Prep: Writing a binary operation rule from a description in words
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Worked Example: Testing the even numbers for closure under addition
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Quiz: Testing the odd numbers for closure under addition
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Practice: Testing a set for closure under multiplication
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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: Subtraction as an example of neither law
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Common Mistakes: Distributivity on a set of three elements
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Worked Example: Finding the identity element from a rule such as a*b = a + b - 3
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Quiz: Finding the identity element from an operation table
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Practice: Why an identity element must work from both sides
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Worked Example: The law for multiplying powers of the same base
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WAEC Prep: Applying two index laws inside one expression
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Worked Example: Rewriting a negative index as a fraction
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Quiz: A negative index on a fraction, and turning it upside down
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Practice: A fractional index with numerator one, read as a root
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