1,334 prompts matching "Sum of an arithmetic series given the first and last term"
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Final Revision: Counting the number plates or codes that can be formed under a rule
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Show All Working: Counting the handshakes, or the lines joining n points
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Final Revision: Combinations used with the addition and multiplication principles
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Show All Working: The half angle formulae and the t-substitution
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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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Learn: Solving sin x equals a given value between 0 and 360 degrees
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Spot My Mistake: Solving an equation by first applying a Pythagorean identity
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WAEC Prep: Solving an equation by first applying a double angle formula
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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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Show All Working: Reading the solutions of a trigonometric equation off a graph
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Worked Example: The midpoint formula applied to a given segment
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Quiz: The gradient of the line through two points
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WAEC Prep: Proving two given lines parallel from their gradients
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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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Learn: The equation of a circle with its centre at the origin
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Common Mistakes: The condition for a line to be a tangent to a circle
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Worked Example: The parametric form of a point on a parabola
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Practice: The ellipse in standard form, and its two axes
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