Given:

To find:
The value of
.
Solution:
We know that,
...(i)
Where n is an integer.
We have,

Using (i), it can be written as


It is given that
.


Therefore, the value of the given function expression is
.
Answer:
18.7
Step-by-step explanation:
8.4617....
Hope this helped you :)
T = 2 π / | 4/7 |
T = 2 π / 4/7
T = 2 π × 7 / 4
T = 7 π / 2
Thus the correct answer is option A .