1,045 prompts matching "Expressing a cos x plus b sin x in the form R cos of x minus alpha"
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Find the value of k: quadratic with equal roots
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Learn: Factorising a quadratic whose coefficient of x squared is one
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Quiz: Factorising a difference of two squares in order to solve it
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WAEC Prep: The minimum value of a quadratic found by completing the square
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Learn: Deriving the quadratic formula by completing the square
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WAEC Prep: What the formula gives when the discriminant is negative
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Common Mistakes: A sign error in the formula, and how to catch it
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Final Revision: A word problem solved with the quadratic formula
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Explain Back: Finding a missing coefficient from a stated sum of roots
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Spot My Mistake: Finding a missing coefficient from a stated product of roots
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Quiz: The value of one over alpha squared plus one over beta squared
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Practice: The value of alpha to the fourth plus beta to the fourth
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Spot My Mistake: The value of alpha over beta plus beta over alpha
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Learn: Forming the quadratic that decides where a line meets a curve
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WAEC Prep: Finding the values of m for which a line cuts a curve twice
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Practice: Showing that x plus 3 is a factor of a given polynomial
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Common Mistakes: Using the factor theorem before dividing
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Common Mistakes: Simplifying a compound statement using the laws
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WAEC Prep: The probability of at least one of a kind
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Learn: The formula for the general term of an expansion
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