1,322 prompts matching "The middle term when n is even"
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Common Mistakes: Arrangements restricted at the first or the last place
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Spot My Mistake: The identity that n choose r equals n choose n minus r
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Spot My Mistake: The double angle formula for sine
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Common Mistakes: Expressing a cos x plus b sin x in the form R cos of x minus alpha
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Common Mistakes: Giving the general solution of a trigonometric equation
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Spot My Mistake: The effect of c in y equals sin x plus c
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Common Mistakes: Sketching two trigonometric curves on the same axes to find where they meet
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Learn: The distance between two points
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Spot My Mistake: The general form ax plus by plus c equals nought
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Common Mistakes: The angle between two lines found from their gradients
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Final Revision: The perpendicular distance from a point to a line
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Spot My Mistake: The equation of the tangent to a circle at a point on it
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Common Mistakes: The condition for a line to be a tangent to a circle
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Spot My Mistake: The foci of an ellipse
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Learn: The range, and why it is a weak measure of spread
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Spot My Mistake: The standard deviation of an ungrouped set of data
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Common Mistakes: The coefficient of variation, for comparing two sets
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Worked Example: The sign convention for clockwise and anticlockwise moments
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Spot My Mistake: The point at which a loaded beam will tip about its support
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WAEC Prep: A couple, and why its moment is the same about every point
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