Need help with this question

Option 1: 28 is the correct answer.

Step-by-step explanation:

The given expression for sum is:

There will be four terms in the sum

We have to find the terms by putting n=1,2,3,4 as n=1 to 4

Putting n=1

Putting n=2

Putting n=3

Putting n=4

So the summation will expand to:

Hence,

Option 1: 28 is the correct answer.

i think this could be a possible answer (1 / 84) -1

good luck! : d

so far i think you have the right thing going for you just remember soh cah toh

step-by-step explanation:

sine over hypotenuse

cosine   equals adjacent

tangent over hypotenuse