1.

Find the values of cos(2cos^(-1)x+sin^(-1)x) at x = 1/5, where 0 le cos^(-1)x le pi and -pi//2 le sin^(-1)x le pi//2.

Answer»

`(2sqrt(6))/5`
`-(2sqrt(6))/5`
`SQRT(6)/5`
`-sqrt(6)/5`

ANSWER :B


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