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Q.

Sin-1x+sin-1(1-x)=cos-1xx 

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a

1, 0

b

-1, 1

c

0,12

d

2, 0

answer is C.

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Detailed Solution

sin-1(1-x)=cos-1x-sin-1x sin-1(1-x)=π2-2sin-1x 1-x=sinπ2-2sin-1x 1-x=cos2sin-1x 1-x=1-2sin2sin-1x 1-x=1-2x2    x=2x2     x=0, 12

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Sin-1x+sin-1(1-x)=cos-1x⇒x ∈