1,328 prompts matching "Learn: What an identity element is"
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Worked Example: Finding a value from a given probability by working backwards
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Quiz: Writing a two-dimensional vector as a column
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Quiz: The direction cosines of a vector in three dimensions
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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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Worked Example: The position vector of the midpoint of AB
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Explain Back: The dot product of two perpendicular vectors
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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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Worked Example: Squaring a complex number
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Quiz: The argument of a complex number
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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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Practice: Why complex roots of a real quadratic come in conjugate pairs
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Explain Back: Forming a quadratic equation with given complex roots
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Practice: Differentiating x squared from first principles
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Explain Back: Differentiating one over x from first principles
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Worked Example: The quotient rule for differentiation
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