755 prompts matching "IGCSE Additional Maths Y11: The identity one plus tan squared equals sec squared"
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Simplifying an expression with brackets and indices together
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Learn: What an identity element is
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Multiplying two surds together
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Rationalising the denominator when it's a surd minus a surd
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Interpreting neither-nor in a Venn diagram problem
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Sum of the first n terms of an arithmetic series
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Finding the number of terms in an arithmetic series
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Deciding whether a geometric series converges
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Finding where a line crosses the x-axis and y-axis
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Finding the equation of a line parallel to the x-axis or y-axis through a point
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Solving a linear inequality and showing the solution
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Changing the subject of a simple formula
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Learn: Telling a rational number from an irrational one
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Worked Example: Why the square root of a non-square whole number is irrational
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Explain Back: Where the surds sit on the number line
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Spot My Mistake: The decimal expansion of an irrational number, and why it never repeats
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Common Mistakes: Why a rational number added to an irrational one stays irrational
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Quiz: Reducing two surds to the same root in order to compare them
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Worked Example: Adding two surds that simplify to the same root
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Learn: Why a surd is never left in the denominator
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