1.

If alpha=3sin^(-1)(6/11) and beta=3cos^(-1)(4/9), where the inverse trigonometric functions take only the principal values, then the correct option(s) is(are)

Answer»

`cosbeta GT 0`
`sinbeta LT 0`
`cos(alpha+beta) gt 0`
`COSALPHA lt 0`

Answer :B::C::D


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