Question

find all the solutions of sec theta - 2 =0. It says use "or" as necessary and gives an example of kpi.

Answer 1

sec t (theta) - 2 = 0
sec t = 2
1/ cos t = 2
cos t =  1/2
Answer:
t = π / 3 + 2 k π ,  or :  t = 5 π / 3 + 2 kπ,
k ∈ Z