cos^(-1)x=tan^(-1)x then...

`cos^(-1)x=tan^(-1)x` then

A

`x^(2)=(sqrt(5)-1)/(2)`

B

`x^(2)=(sqrt(5)+1)/(2)`

C

`sin(cos^(-1)x)=(sqrt(5)-1)/(2)`

D

`tan(cos^(-1)x)=(sqrt(5)-1)/(2)`

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The correct Answer is:

A, C

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