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1996-09-02
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828b
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ACOS(3) UNIX Programmer's Manual ACOS(3)
NNAAMMEE
aaccooss - arc cosine function
SSYYNNOOPPSSIISS
##iinncclluuddee <<mmaatthh..hh>>
_d_o_u_b_l_e
aaccooss(_d_o_u_b_l_e _x)
_f_l_o_a_t
aaccoossff(_f_l_o_a_t _x)
DDEESSCCRRIIPPTTIIOONN
The aaccooss() and aaccoossff() functions compute the principal value of the arc
cosine of _x in the range [0, pi].
RREETTUURRNN VVAALLUUEESS
Exceptional cases are handled by matherr(3).
SSEEEE AALLSSOO
sin(3), cos(3), tan(3), asin(3), atan(3), atan2(3), sinh(3),
cosh(3), tanh(3), math(3), matherr(3)
BSD Experimental May 2, 1991 1