1.

If cos^(-1)x=tan^(-1)x, then

Answer»

`x^(2)=(SQRT(5)-1)/2`
`x^(2)=(sqrt(5)+1)/2`
`sin(COS^(-1)x)=(sqrt(5)-1)/2`
`tan(cos^(-1)x)=(sqrt(5)-1)/2`

Answer :A


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