The Intel 8087 chip, released in 1980, significantly accelerated floating-point operations in IBM PCs and other systems.
Its tangent instruction, FPTAN, combined a popular approach called CORDIC with polynomial approximation to achieve both high accuracy and performance.
The 8087 outpaced the 8086 microprocessor by computing a tangent in 90 microseconds, compared to the 13,000 microseconds it took for the 8086.
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