1,333 prompts matching "Checking an inverse by working the operation both ways"
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WAEC Prep: The three forms of the double angle formula for cosine
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Quiz: Solving tan x equals a given value, and the period of the tangent
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Worked Example: The shape, period and range of the cosine curve
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Quiz: The tangent curve and its asymptotes
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Final Revision: The graphs of y equals sec x, cosec x and cot x
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Common Mistakes: The angle between two lines found from their gradients
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Final Revision: The perpendicular distance from a point to a line
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Worked Example: The equation of a circle with a given centre and radius
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Quiz: Finding the centre and the radius from the general equation
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Spot My Mistake: The equation of the tangent to a circle at a point on it
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WAEC Prep: The length of the tangent from an external point
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Common Mistakes: The condition for a line to be a tangent to a circle
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Quiz: The equation of the tangent to a parabola
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Explain Back: The eccentricity of an ellipse
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Spot My Mistake: The foci of an ellipse
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WAEC Prep: The hyperbola in standard form, and its asymptotes
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Worked Example: The interquartile range of a set of ordered data
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Quiz: The semi-interquartile range
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Explain Back: The variance of an ungrouped set of data
I have just studied the variance of an ungrouped set of data in my SS3 Further Mathematics
Spot My Mistake: The standard deviation of an ungrouped set of data
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