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What is the value of (4//3) cot^2(pi//6)...

What is the value of `(4//3) cot^2(pi//6) + 3cos^2(150^@) - 4 cosec^2 45^@+8 sin (pi//2)`?

A

a) `25//4`

B

b) 1

C

c) `-7//2`

D

d) `13//2`

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