1.

While defining inverse trigonometric functions , a new system is followed where co-domains has been redefined as follows : If f(X)=3sin^(-1)x-2cos^(-1)x then f(x) is

Answer»

`cos 2x is 3/5`
`cos 2x is 1/2`
tan x is `1/2`
tan x is `1/3`

ANSWER :B


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