1.

If sin^(-1)x=theta+beta and sin^(-1)y=theta-beta, then 1 + xy is equal to

Answer»

`SIN^(2)THETA+sin^(2)beta`
`sin^(2)theta+COS^(2)beta`
`cos^(2)theta+cos^(2)theta`
`cos^(2)theta+sin^(2)beta`

Answer :B


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