How do you find the first 4 positive values and first two negative values for x such that cos x = -0.67?
1 Answer
May 15, 2015
cos x = -0.67
Calculator gives-> x = 132.07 deg
Trig unit circle gives another arc that has the same cos value:
x = 227. 93.
The 2 negative arcs are
x = - 132.07. and x = -227.93
