Subtracting whole numbers does not include subtracting negative numbers, whereas when subtracting integers you can include negative numbers.
Step-by-step explanation:
r=4.2
cicumference of circle =2Πr=2×3.14×4.2=26.3
Answer:
0.0417
Step-by-step explanation:
Answer:

Step-by-step explanation:
We want to solve
, where
.
We rewrite in terms of sine and cosine.


Use the Pythagorean identity:
.




This is a quadratic equation in
.
By the quadratic formula, we have:




or 
or 
or 
When
, 
on the interval
.
When
,
is not defined because 