cos(1) exact value? May 2, 2022 by Anirban Share via: Facebook Twitter LinkedIn Mix More cos^-1(-1) find the exact value of each expression The value of cos 1° is equal to the x-coordinate (0.9998). ∴ cos 1° = 0.9998. cos^-1 1 find the exact value of each expression Share via: Facebook Twitter LinkedIn Mix More