Answer:
8
Step-by-step explanation:
Cos(pi) = -1
You should have this memorized along with other values such as
sin(0) = 0
cos(0) = 1
sin(pi/2) = 1
cos(pi/2) = 0
sin(pi) = 0
cos(pi) = -1
sin(3pi/2) = -1
cos(3pi/2) = 0
and remember that tan = sin/cos
Answer:

Step-by-step explanation:

Answer:
in my opinion I think the answer is a because I don't know why
Step-by-step explanation: