1,326 prompts matching "Rationalising the denominator when it's a surd minus a surd"
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Practice: Arrangements when some of the objects are identical
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Learn: The meaning of n choose r, and how to evaluate it
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WAEC Prep: Pascal's triangle and the combination numbers in it
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Final Revision: Combinations used with the addition and multiplication principles
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Learn: The Pythagorean identity, sin squared plus cos squared equals one
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Worked Example: The identities for one plus tan squared and one plus cot squared
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Practice: The compound angle formula for cosine of A minus B
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Show All Working: The half angle formulae and the t-substitution
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Practice: The equation of a line through a point with a given gradient
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Learn: The equation of a circle with its centre at the origin
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Worked Example: The equation of a circle with a given centre and radius
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Common Mistakes: The condition for a line to be a tangent to a circle
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Learn: The parabola y squared equals 4ax, with its focus and directrix
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Practice: The ellipse in standard form, and its two axes
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Explain Back: The eccentricity of an ellipse
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WAEC Prep: The hyperbola in standard form, and its asymptotes
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Final Revision: The focus-directrix definition shared by all the conics
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Learn: The range, and why it is a weak measure of spread
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Learn: The moment of a force about a point, and its units
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WAEC Prep: A couple, and why its moment is the same about every point
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