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If alpha=3sin^(-1)(6/11) and beta=3 cos^...

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)

A

`cos betagt0`

B

`sinbetalt0`

C

`cos(alpha+beta)gt0`

D

`cos alpha lt0`

Text Solution

Verified by Experts

The correct Answer is:
B, C, D
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