If A=133^@, then 2cos(A/2) is equal to...

If `A=133^@`, then `2cos(A/2)` is equal to

A

1) `-sqrt(1+sinA)-sqrt(1-sinA)`

B

2) `-sqrt(1+sinA)+sqrt(1-sinA)`

C

3) `sqrt(1+sinA)-sqrt(1-sinA)`

D

4) `sqrt(1+sinA)+sqrt(1-sinA)`

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