Using new equipment, a worker finished 4 more parts in an hour than was planned and fulfilled his daily task not in 8 hours but in 6 hours. how many parts did the worker had to finish that day according to schedule? i really need and asap i beg plz

answer: cos [   arcsin (3/5) - arccos (1/2) ] =

step-by-step explanation: × = 3/5 = 0.6--> x = 36.87 and x = 180 - 36.87 = 143.13 deg

cos y = 1/2 --> y = +- 60 deg a. cos (x - y) = cos (143.13 - 60) = cos 83,13  

=

0.12

b. cos (36.87 - 60) = cos (-23.23) = 0.92