◄Summary► ◄Example► ◄Up► ◄Contents► ◄Index► ◄Back► ─────Run-Time Library─────────────────────────────────────────────────────── The cos, sin, and tan trigonometric functions return the cosine, sine, and tangent, respectively, of <x>. The long double functions use an 80-bit long double form of arguments and return values. In all other respects, they are identical to the regular functions. Return Value If <x> is large, a partial loss of significance in the result may occur in a trigonometric function. In this case, the function generates a _PLOSS error. If <x> is so large that significance is completely lost, the function prints a _TLOSS message to stderr and returns 0. In both cases, errno is set to ERANGE. -♦-