1. A system comprising: a four element dot product circuit (Dp4) configured to— (a) receive four first inputs (v1, v2, v3, v4) and four second inputs (u1, u2, u3, u4); (b) input the four first inputs and four second inputs to four multipliers (Mul 1 , Mul 2 , Mul 3 , and Mul 4 ); (c) input outputs of multipliers Mul 1 and Mul 2 to an adder Adder 12 ; (d) input outputs of multipliers Mul 3 and Mul 4 to an adder Adder 34 ; (e) input outputs of Adder 12 and Adder 34 into an adder AdderAll; (f) output an output of AdderAll; a trigonometric circuit configured to— calculate an estimate of x/pi by inputting a representation of 1/pi and x to the multipliers Mul 1 , Mul 2 , Mul 3 , Mul 4 ; process the outputs of the multipliers Mul 1 , Mul 2 , Mul 3 , and Mul 4 using adders Adder 12 , Adder 34 , and AdderAll to compute t effective to increase an accuracy of an output of a trigonometric function circuit receiving t as an input argument with respect to a theoretically correct value for a trigonometric function corresponding to the trigonometric function circuit and taking x/pi as an input as compared to the output of the trigonometric circuit for Mul 1 +Mul 2 +Mul 3 +Mul 4 as the input argument.