755 prompts matching "Finding the angle between two vectors from their dot product"
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Number of elements in a set from a Venn diagram region count
I am in SS 1. I'm going to explain counting n(A only), n(B only) and n(A and B) separately
Deriving the arithmetic series sum formula
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Finding which term of a sequence equals a given value
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Condition for two lines to be parallel
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Condition for two lines to be perpendicular
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Coordinate geometry proof: right-angled triangle
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Coordinate geometry proof: isosceles triangle
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Coordinate geometry applied to a triangle's area check
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Expanding a product of two brackets
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Subtracting two algebraic fractions
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Multiplying two algebraic fractions
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Learn: Telling a rational number from an irrational one
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Practice: Deciding whether root 16 is rational or irrational
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Worked Example: What makes two surds equal
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Learn: Why a surd is never left in the denominator
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Quiz: Rationalising a denominator of the form one over root 3
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Practice: Rationalising a denominator with a whole number multiplying the surd
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Learn: The conjugate of a compound surd expression
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Quiz: Rationalising a denominator of the form one over 2 plus root 3
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Practice: Rationalising a denominator of the form a plus root b over c minus root d
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