1.

If `sin^-1 x+sin^-1=(2pi)/3,` then `cos^-1 x cos^-1 y` is equal to

Answer» Correct Answer - `(pi)/(3)`
`sin^(-1) x + sin^(-1) y = (2pi)/(3)`
`rArr (pi)/(2) - cos^(-1) x + (pi)/(2) - cos^(-1) y = (2pi)/(3)`
`rArr cos^(-1) x + cos^(-1) y = pi - (2pi)/(3) = (pi)/(3)`


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