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Write the value of cos(sin^(-1)x+cos^(-1...

Write the value of `cos(sin^(-1)x+cos^(-1)x)` , `|x|lt=1` .

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We know that `sin^(-1)x+cos^(-1)x, abs(x)<-1` is `pi/2`
`cos(sin^(-1)x+cos^(-1)x)=cos frac{pi}{2}=0`
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