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an equation containing trigonometric ratios of angles.
a number which combined with its inverse results in the identity 1, e.g. 4 × ¼ = 1.
a polygon formed by joining the midpoints of the top of the columns of a histogram.
a summary of a data set that includes the minimum and maximum values, and the first, second and...
a pyramid with its vertex directly above the centre of its square base.