Answer:
x = 
Step-by-step explanation:
given
cos(x -
) = - 1, then
x -
=
(- 1) = π
Add
to both sides, hence
x = π +
= 
Answer:
x ≤ -10
Step-by-step explanation:
distribute -2 into your denominator (5)
Answer:
r=1/2
Step-by-step explanation:
the geometric sequence is being multiplied by 1/2 every time
28/2=14
14/2=7
7/2=3.5 and so on