1,332 prompts matching "Teach me how to simplify surds"
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WAEC Prep: Calculating a moment as force times perpendicular distance
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Spot My Mistake: The moment of a force whose line of action is not perpendicular
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Worked Example: The moment of a force about a point on its own line of action
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Spot My Mistake: Using concurrence to find the direction of an unknown third force
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WAEC Prep: The statement of Lami's theorem
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Worked Example: Matching each force to the sine of the angle opposite it
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Spot My Mistake: Why the probabilities in a distribution must sum to one
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WAEC Prep: The mean of a binomial distribution as np
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Explain Back: Finding n and p from a given mean and variance
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WAEC Prep: Why the mean and the variance of a Poisson distribution are equal
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Explain Back: Testing whether data are Poisson by comparing mean and variance
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WAEC Prep: The shape and the symmetry of the normal curve
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WAEC Prep: The standard normal distribution, with mean nought and variance one
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Explain Back: Converting a value to a z-score
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Quiz: Reading the wording of a question to decide which distribution applies
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Worked Example: The distance between two points in three dimensions
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Quiz: The direction of a vector as an angle with the x-axis
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Worked Example: Finding the unit vector in the direction of a given vector
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Spot My Mistake: The vector from A to B as the difference of two position vectors
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Worked Example: The position vector of the midpoint of AB
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