Evaluate cos(sin^-1a)

(√1 - a²)

Step-by-step explanation:

cos(sin⁻¹ a) = cos x°

sin x° = sin (sin⁻¹ a) = a

as shown in the attached picture

sin x° = a/1         cos x° = (√1 - a²) / 1 = (√1 - a²)

At a constant it will take one hour to travel 32 mi.at that speed it will take 1/2 hr to travel the remaining 16 mi.it will take 1+1/2 hr to travel the 48mi @ 32mph.so 1 hr = 60 min& 1/2 hr = 30 min1+1/2 hr = 90 min.there are 60s in each 90 × 60 = 3600 seconds.the real question seriously is he why are they driving so slow? ! lol.