1.

Which of the following is/are a rational number ?

Answer»

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

Answer :A::B::C


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