1,251 prompts matching "how many ways can a president and secretary be chosen from 8 people"
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WAEC Prep: The imaginary unit i, and why i squared is minus one
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Worked Example: The powers of i, and the cycle they follow
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Quiz: Subtracting one complex number from another
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Practice: Equating real and imaginary parts to find two unknowns
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Spot My Mistake: Dividing one complex number by another using the conjugate
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WAEC Prep: The modulus and the argument taken together
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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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WAEC Prep: Expanding cos of 3 theta using de Moivre's theorem
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Learn: The cube roots of unity
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WAEC Prep: The sum and product of a pair of complex roots
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WAEC Prep: A quadratic whose roots are 2 plus i and 2 minus i
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WAEC Prep: Differentiating a sum of a polynomial and a trigonometric term
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Practice: Differentiating sin x and cos x
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WAEC Prep: The greatest and least values of a function in a closed interval
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WAEC Prep: The indefinite integral, and its notation
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Practice: The sign convention for displacement, velocity and acceleration
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WAEC Prep: The horizontal and vertical components of a projectile's velocity
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WAEC Prep: Newton's first law, and what it says about equilibrium
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Quiz: Newton's third law, and identifying the pair of forces
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