1,474 prompts matching "A joint variation set in a Nigerian transport fare"
Worked example: Deriving the negative index from the division law
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WAEC pitfalls: Applying a law to bases that are not the same
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Teach me: What makes an equation indicial
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Worked example: An indicial equation solved with logarithms
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WAEC pitfalls: Equating indices when the bases have not been matched
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Teach me: Naming the opposite, adjacent and hypotenuse
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Worked example: A two-step problem needing two ratios
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WAEC pitfalls: Labelling the sides relative to the wrong angle
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WAEC pitfalls: Quoting a special angle ratio as a decimal when an exact value is asked for
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Teach me: The shape and period of the sine and cosine curves
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Worked example: Finding the height of a mast from its angle of elevation
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WAEC pitfalls: Taking the angle from the vertical instead of the horizontal
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Teach me: A logarithm as the index a base must be raised to
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Worked example: Using the power law to simplify a logarithmic expression
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WAEC pitfalls: Treating the logarithm of a sum as the sum of logarithms
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Worked example: Bringing a negative number into the right residue class
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WAEC pitfalls: Reducing to a residue outside the permitted range
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Practice set: The empty set and the universal set
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Spot my mistake: Subsets, and how many a set has
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Practice set: The difference of two sets
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