One of the mysteries of the English language finally explained.
Unity minus cosine.
- ‘The sector is very similar to the one described in the text, except that it lacks the line of versed sines.’
- ‘This computation was effected by using the multiples of twice the versed sine formerly employed.’
- ‘The greatest of all versed sines is a diameter, as that of all natural sines is a radius.’
- ‘It is a versed sine curve, originally studied by Fermat.’
- ‘The addition theorems for the hyperbolic secent, cosecent, versed sine, and haversed sine are not interesting.’
The rise of an arch of a bridge.
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