Step 1: Write out the function given

Step 2: Interprete the question given

The question requested we find the summation of the first five terms for f(k/2), when k is 1, 2, 3, 4, and 5
Step 3: Find the expression for f(k/2)


Hence, the answer is 33.75
The pair of angles are adjacent angles and supplementary and their measure =180
This is probably wrong but my guess is 13 so maybe verify it but that’s my best!
A right triangle. Hope this helps.