1.

Which of the following is a rational number ?

Answer»

`sin(tan^(-1)3+"tan"^(-1)1/3)`
`cos((p)/2-"sin"^(-1)3/4)`
`log_(2)(sin(1/4"sin"^(-1)(sqrt(63))/8))`
`tan(1/2"cos"^(-1)(sqrt(5))/3)`

Answer :A::B::C


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