1,223 prompts matching "Condition for two lines to be perpendicular"
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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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Learn: Subtracting one vector from another
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Practice: Deciding whether a point lies on a given line
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Learn: The real and the imaginary parts of a complex number
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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 product of a complex number and its conjugate
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Practice: The sum of a complex number and its conjugate
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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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Practice: The addition of complex numbers shown on an Argand diagram
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Spot My Mistake: Deriving a multiple angle formula from de Moivre's theorem
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Learn: The cube roots of unity
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Quiz: The roots of a complex number shown on an Argand diagram
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Learn: Choosing between the product rule and the quotient rule
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Worked Example: Differentiating a bracket raised to a power
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Quiz: Why the power rule fails for the integral of one over x
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Worked Example: The area between a curve and the x-axis
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