1,331 prompts matching "Choosing between factorising and the formula"
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Learn: The Pythagorean identity, sin squared plus cos squared equals one
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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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Worked Example: Solving cos x equals a negative value, and finding both solutions
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Practice: Solving an equation of the form sin of 2x equals a given value
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Show All Working: Solving a cos x plus b sin x equals c by the R method
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Common Mistakes: Giving the general solution of a trigonometric equation
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Practice: The effect of a in y equals a sin x
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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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Common Mistakes: Sketching two trigonometric curves on the same axes to find where they meet
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Quiz: The gradient of the line through two points
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Practice: The equation of a line through a point with a given gradient
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Spot My Mistake: The general form ax plus by plus c equals nought
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WAEC Prep: Proving two given lines parallel from their gradients
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Show All Working: Proving two given lines perpendicular 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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Practice: The equation of a circle on a given diameter
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Spot My Mistake: The equation of the tangent to a circle at a point on it
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WAEC Prep: The length of the tangent from an external point
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