Answer:
0.714286
Step-by-step explanation:
yes
Answer:

Step-by-step explanation:
We need to find the value of
.
C stands for combination.
The formula of combination is as follows :

Here,
n = 19 and r = 1
So,

So, the value of
is 19.
If you are talking about pi/4 radians then that would be 45 degrees because pi in radians is 180 degrees.