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If sin^(-1)(x-(x^2)/2+(x^3)/4-ddot)+cos^...

If `sin^(-1)(x-(x^2)/2+(x^3)/4-ddot)+cos^(-1)(x^2-(x^4)/2+(x^6)/4)=pi/2` for `0<|x|

A

`1//2`

B

`1`

C

`-1//2`

D

`-1`

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The correct Answer is:
B
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