1,245 prompts matching "Empty set and its notation"
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Practice: The magnitude of the sum of two vectors
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Worked Example: Finding the unit vector in the direction of a given vector
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Practice: A vector of stated magnitude in a given direction
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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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Worked Example: The triangle law of vector addition
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Practice: The dot product as the magnitudes times the cosine of the angle
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Worked Example: Testing two vectors for perpendicularity
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Quiz: The vector equation of the line through two given points
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Practice: Deciding whether a point lies on a given line
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Spot My Mistake: The equilibrium condition written in vector form
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Quiz: Subtracting one complex number from another
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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 argument of a complex number
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Practice: The argument of a complex number in the second or third quadrant
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Quiz: Writing a complex number in polar form
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Practice: Converting a complex number from polar form back to a plus bi
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Spot My Mistake: Deriving a multiple angle formula from de Moivre's theorem
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Practice: Why complex roots of a real quadratic come in conjugate pairs
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