1.

If `alpha = sin^(-1) (cos(sin^-1) x)) and beta = cos^(-1) (sin (cos^(-1) x))`, then find `tan alpha. tan beta.`

Answer» `beta = cos^(-1) (sin ((pi)/(2) - sin^(-1) x))`
`= cos^(-1) [cos (sin^(-1) x)]`
Also, `alpha = sin^(-1) [cos (sin^(-1) x)]`
`:. alpha + beta = (pi)/(2)`
`rArr tan alpha = cot beta " or " tan alpha. tan beta = 1`


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