1,327 prompts matching "Forming an algebraic expression from a word problem"
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Learn: The meaning of n choose r, and how to evaluate it
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Worked Example: The difference between a permutation and a combination
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WAEC Prep: Pascal's triangle and the combination numbers in it
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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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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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Spot My Mistake: The double angle formula for sine
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WAEC Prep: The three forms of the double angle formula for cosine
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Show All Working: The half angle formulae and the t-substitution
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Final Revision: Proving an identity by working on one side only
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Learn: Solving sin x equals a given value between 0 and 360 degrees
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Worked Example: Solving cos x equals a negative value, and finding both solutions
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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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Learn: The shape, period and range of the sine curve
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Worked Example: The shape, period and range of the cosine curve
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Final Revision: The graphs of y equals sec x, cosec x and cot x
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Learn: The distance between two points
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Worked Example: The equation of a circle with a given centre and radius
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