1,334 prompts matching "Expressing a rationalised answer in the form a root b over c"
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Practice: Converting a complex number from polar form back to a plus bi
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WAEC Prep: De Moivre's theorem used with a negative index
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WAEC Prep: Expanding cos of 3 theta using de Moivre's theorem
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Learn: The cube roots of unity
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Practice: Why complex roots of a real quadratic come in conjugate pairs
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WAEC Prep: The definition of the derivative as a limit
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Explain Back: Differentiating one over x from first principles
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WAEC Prep: The chain rule applied twice in one problem
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WAEC Prep: The chain rule for a function of a function
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WAEC Prep: A stationary point at which the second derivative is nought
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WAEC Prep: The greatest and least values of a function in a closed interval
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WAEC Prep: Finding the stationary points of a curve
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Spot My Mistake: Classifying a stationary point by the second derivative
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WAEC Prep: The indefinite integral, and its notation
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Spot My Mistake: Finding the constant of integration from a given point
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WAEC Prep: A definite integral evaluated with the limits reversed
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WAEC Prep: The area under a straight line checked by a trapezium
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WAEC Prep: The distance travelled in the first five seconds
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Quiz: Using the initial conditions to fix the constants in a kinematics problem
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WAEC Prep: The rate at which the height of a liquid rises in a cone
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