755 prompts matching "IGCSE Additional Maths Y11: The identity for one minus cos squared — Show All Wo"
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Finding the point of intersection of two lines
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Equation of the perpendicular bisector of a segment
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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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Simultaneous equations of a line and the coordinate axes
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Finding the equation of a median of a triangle
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Factorising the difference of two squares
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Factorising the sum and difference of two cubes
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Simplifying an expression with brackets and indices together
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Forming an algebraic expression from a word problem
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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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Spot My Mistake: The decimal expansion of an irrational number, and why it never repeats
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Quiz: Reducing two surds to the same root in order to compare them
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Learn: Simplifying root 72 into its simplest form
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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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Spot My Mistake: Rationalising and then cancelling a common factor
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Learn: The conjugate of a compound surd expression
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Worked Example: Why multiplying by the conjugate clears the surd
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Spot My Mistake: Simplifying the denominator once the conjugate has been used
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