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The value of the expression (1+sin2alpha...

The value of the expression `(1+sin2alpha)/(cos(2alpha-2pi)tan(alpha-(3pi)/4))-1/4sin2alpha(cot(alpha/2)+cot((3pi)/2+alpha/2))` is

A

1) 0

B

2) 1

C

3) `sin^2 (alpha/2)`

D

4) `sin^2alpha`

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