If `A = ([cos alpha, sin alpha], [-sin alpha, cos alpha]),` then `A^(-1)` is ...................
`([cos alpha, sin alpha], [sin alpha, cos alpha])`
`([-cos alpha, sin alpha], [sin alpha, -cos alpha])`
`([sin alpha, cos alpha], [cos alpha, sin alpha])`
`([cos alpha, -sin alpha], [sin alpha, cos alpha])`