991 prompts matching "Drawing a line of best fit by eye"
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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Worked example: The reference angle for an angle beyond 90 degrees
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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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Worked example: Using the power law to simplify a logarithmic expression
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WAEC pitfalls: A negative characteristic written the wrong way
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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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WAEC pitfalls: Writing a set with its elements repeated
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Worked example: The formula for the number in a union
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WAEC pitfalls: Counting the overlap twice in a union
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Worked example: The converse, inverse and contrapositive
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WAEC pitfalls: Negating a statement containing all or some
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Worked example: A tautology and a contradiction
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Worked example: Changing the subject when the letter occurs on both sides
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Worked example: Using the constant to predict a further value
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WAEC pitfalls: Treating a partial variation as a direct one
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WAEC pitfalls: Cancelling a factor containing the unknown and losing a root
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Worked example: Substituting into the quadratic formula carefully
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WAEC pitfalls: Dropping the plus-or-minus from the formula
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