Presumably the poster meant polynomial approximations of trigonometric functions not instructions for trigonometric functions, which are missing in most CPUs, though many GPUs have such instructions.

x86-64 had instructions for the exponential and logarithmic functions in Xeon Phi, but those instructions have been removed in Skylake Server and the later Intel or AMD CPUs with AVX-512 support.

However, instructions for trigonometric functions have no longer been added after Intel 80387, and those of 8087 and 80387 are deprecated.