cos^(-1)x = tan^(-1)x, then: a. x^2=((...

`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)`

A

`x^(2) = (sqrt5 -1)/2`

B

`x^(2) = (sqrt5 + 1)/2`

C

`sin ( cos^(-1) x) = (sqrt5 -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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