1,326 prompts matching "Solve the trigonometric equation cos^2(x) - sin^2(x) = 0.5, for 0 <= x <= 360"
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WAEC Prep: Pascal's triangle and the combination numbers in it
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Final Revision: Combinations used with the addition and multiplication principles
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Worked Example: Solving cos x equals a negative value, and finding both solutions
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Quiz: Solving tan x equals a given value, and the period of the tangent
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Explain Back: Solving a quadratic in sin x
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Quiz: The tangent curve and its asymptotes
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WAEC Prep: A phase shift in y equals sin of x minus d
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Learn: The distance between two points
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Quiz: The gradient of the line through two points
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WAEC Prep: Proving two given lines parallel from their gradients
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Final Revision: The perpendicular distance from a point to a line
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WAEC Prep: The length of the tangent from an external point
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Learn: The parabola y squared equals 4ax, with its focus and directrix
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Spot My Mistake: The foci of an ellipse
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Common Mistakes: Identifying a conic from a general second-degree equation
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Final Revision: The focus-directrix definition shared by all the conics
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Learn: The range, and why it is a weak measure of spread
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Quiz: The semi-interquartile range
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Practice: The mean deviation from the mean
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Spot My Mistake: The standard deviation of an ungrouped set of data
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