1,304 prompts matching "Practice: Why an identity element must work from both sides"
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Spot My Mistake: The proportion of a normal distribution within one, two and three standard deviations
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WAEC Prep: Comparing two values from different normal distributions by z-score
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Worked Example: The continuity correction when approximating a discrete distribution
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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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Learn: The unit vectors i, j and k
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Worked Example: The position vector of the midpoint of AB
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WAEC Prep: The dot product used to find the work done by a force
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Worked Example: Testing two vectors for perpendicularity
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Learn: The angle between a vector and one of the axes
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WAEC Prep: Why the square root of a negative number needs i
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Learn: The real and the imaginary parts of a complex number
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Spot My Mistake: Dividing one complex number by another using the conjugate
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Worked Example: Squaring a complex number
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Quiz: The product of a complex number and its conjugate
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WAEC Prep: Converting a complex number from polar form into the form a plus bi using tables
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Quiz: The roots of a complex number shown on an Argand diagram
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WAEC Prep: Why the limit is taken as h tends to nought
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Worked Example: The quotient rule for differentiation
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Learn: Choosing between the product rule and the quotient rule
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