1,334 prompts matching "A sign error in the formula, and how to catch it"
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WAEC Prep: Writing the transpose of a matrix by turning rows into columns
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WAEC Prep: The order in which the cofactors are transposed
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WAEC Prep: The adjoint as the transpose of the matrix of cofactors
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WAEC Prep: Reading the solution off the product of the inverse and the constants
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WAEC Prep: Resolving a force into horizontal and vertical components
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Practice: Choosing the most convenient pair of directions to resolve along
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WAEC Prep: The triangle of forces used together with the cosine rule
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Spot My Mistake: Drawing the triangle of forces to scale to find an unknown force
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WAEC Prep: The two conditions for a rigid body to be in equilibrium
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Practice: Why the forces must sum to nought in two perpendicular directions
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Practice: Limiting friction, and the greatest value it can reach
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WAEC Prep: The resultant moment of a couple and a force together
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WAEC Prep: The total moment of two forces about the same point
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WAEC Prep: The triangle of forces and concurrence taken together
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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 conditions for a particle under three forces to be in equilibrium
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Spot My Mistake: Why the probabilities in a distribution must sum to one
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WAEC Prep: The binomial expansion of a plus b all to the power n
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WAEC Prep: The Poisson formula, and what lambda stands for
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WAEC Prep: Using the mean of a Poisson distribution to find a probability
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