direction-cosine

direction cosine

noun Mathematics.
the cosine of the angle made by a given vector and a coordinate axis.
Compare direction angle.


Origin:
1890–95

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Direction-cosine is always a great word to know.
So is interrobang. Does it mean:
a stew of meat, vegetables, potatoes, etc.
a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question.
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