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cos() Mathematics Function cos() Calculate cosine #include <math.h> ddoouubbllee ccooss(_r_a_d_i_a_n) ddoouubbllee _r_a_d_i_a_n; cos calculates the cosine of its argument _r_a_d_i_a_n, which must be in radian measure. ***** Example ***** For an example of this function, see the entry for acos. ***** See Also ***** mathematics library COHERENT Lexicon Page 1
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