1.

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

Answer»

`COS betagt0`
`sinbetalt0`
`cos(ALPHA+beta)gt0`
`cos alpha LT0`

ANSWER :B::C::D


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