1,334 prompts matching "Cross-multiplying to solve an equation with fractions"
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Practice: Factorising a cubic completely once one factor is known
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Explain Back: Forming a cubic equation whose three roots are given
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Explain Back: Solving an inequality that involves a modulus
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Worked Example: The number of arrangements of n different objects in a row
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Practice: Arrangements when some of the objects are identical
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Worked Example: The difference between a permutation and a combination
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Explain Back: Choosing a committee with a stated number from each of two groups
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WAEC Prep: Pascal's triangle and the combination numbers in it
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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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Explain Back: The compound angle formula for tan of A plus B
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WAEC Prep: The three forms of the double angle formula for cosine
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Worked Example: Solving cos x equals a negative value, and finding both solutions
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Common Mistakes: Giving the general solution of a trigonometric equation
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Worked Example: The shape, period and range of the cosine curve
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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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Worked Example: The midpoint formula applied to a given segment
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Explain Back: The equation of the line through two given points
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WAEC Prep: The length of the tangent from an external point
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