1,483 prompts matching "When the cosine rule is needed rather than the sine rule"
Worked example: The equation y equals mx plus c
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Worked example: The equation of a line through two points
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Worked example: The back bearing of a given bearing
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Worked example: The reference angle for an angle beyond 90 degrees
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Worked example: Finding the height of a mast from its angle of elevation
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Worked example: Using the power law to simplify a logarithmic expression
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Worked example: The shape of a logarithmic graph
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Worked example: Bringing a negative number into the right residue class
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Worked example: The number of elements in a set
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Worked example: The formula for the number in a union
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Worked example: The converse, inverse and contrapositive
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Worked example: Using the constant to predict a further value
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Spot my mistake: Factorising a perfect square trinomial
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Worked example: Substituting into the quadratic formula carefully
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Worked example: Solving a related equation by adding a line to the graph
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Worked example: The perimeter of a segment
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Worked example: The slant height in a cone's surface area
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Worked example: The frustum of a pyramid
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Quiz me: Designing a question for a data collection exercise
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Worked example: The class midpoint and the class width
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