4 cos 36^(circ)+cot (7 (1)/(2))^(circ)=...

`4 cos 36^(circ)+cot (7 (1)/(2))^(circ)=`

A

1+sqrt(2)+sqrt(3)+sqrt(4)+sqrt(5)+sqrt(6)

B

`sqrt(5)+1`

C

`sqrt(1)+sqrt(2)+sqrt(3)+sqrt(4)+sqrt(5)+sqrt(6)`

D

`sqrt(5)+sqrt(3)`

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