1.

The value of `"tan"(sin^(-1)("cos"(sin^(-1)x)))"tan"(cos^(-1)(sin(cos^(-1)x))),w h e r ex in (0,1),`is equal to0 (b) 1(c) `-1`(d) none of these

Answer» we have
`cos(sin^(-1)x)=sqrt(1-x^(2)) and sin cos^(-1)x=sqrt(1-x^(2))`
`therefore tan{sin^(-1)(cos sin^(-1)x)}tan{cos^(-12)(sin(cos^(-1)x)}`
`=tan{sin^(-1)sqrt(1-x^(2))}tan{cos^(-1)sqrt(1-x^(2))`
`=tan(sin^(-1)sqrt(1-x^(2))tan{(pi)/(2)-sin^(-1)sqrt(1-x^(2))=1`
`=tan(sin^(-1)sqrt(1-x^(2))cot(sin^(-1))sqrt(1-x^(2))=1`


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