1.

For x,y,z, t in R, sin^(-1)x+cos^(-1)y+sec^(-1)zget^(2)-sqrt(2pi)t+3pi The principal value of cos^(-1)(cos5t^(2)) is

Answer»

`(3PI)/2`
`pi/2`
`pi/3`
`(2PI)/3`

Answer :C


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