find the value of x if cos x = 3/5
by definition, x = arccos(3/5)
of course, x might be in quadrants I or IV.
cos(.9273) = 0.6
cos(5.3559) = 0.6
x = 2kπ ± 0.9273
of course, x might be in quadrants I or IV.
cos(.9273) = 0.6
cos(5.3559) = 0.6
x = 2kπ ± 0.9273