Answer:
18.3125
18.5635
18 13/16
Step-by-step explanation:
We know that
sin²x+cos²x=1
so
clear cos x
cos x=(+/-)√[1-sin²x]
in this problem
<span>Angle 0 is in quadrant 1 -----> cos o and sin o are positive
</span>sin o=2/5
cos x=√[1-(2/5)²]----> cos o=√[1-4/25]----> cos o=√[21/25]---> cos o=√21/5
the answer is
cos o=√21/5
Answer:
Step-by-step explanation:
Round two side of measurement and exercise
Answer:
Step-by-step explanation:
200m^2-800n^2=200(m^2-4n^2)
