$90 because 200-10=180 and divide 180 by 2 which is 90.
Answer: 207
Step-by-step explanation:
8/13 = 0.6153
y = cos-1(0.6153)
y = 52.0
I'm not totally sure if this is what you mean or if this is.
y = cos(8/13) = 0.9999 which to the nearest tenth is 1.0