Tan x+secx=2cosx ?
#tan x+secx=2cosx# ?
1 Answer
Jan 30, 2018
Solve
Solve the above quadratic equation for sin x.
Since a - b + c = 0, use shortcut. The 2 real roots are:
sin x = -1 and
a. sin x = - 1. Unit circle gives -->
b.
Trig table and unit circle give 2 solutions: