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If f(x)=cos^(- 1)x+cos^(- 1){x/2+1/2sqrt...

If `f(x)=cos^(- 1)x+cos^(- 1){x/2+1/2sqrt(3-3x^2)}`then

A

` f((2)/(3))= (pi)/(3) `

B

` f((2)/(3))= 2 "cos"^(-1)(2)/(3) - (pi)/(3) `

C

` f((1)/(3))= (pi)/(3) `

D

` f((1)/(3))= 2 "cos"^(-1)(1)/(3)- (pi)/(3)`

Text Solution

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The correct Answer is:
A, D
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