Question 390038
The new point {{{(matrix(2,1, x,y)) = (matrix(2,2,cos(theta),-sin(theta),sin(theta), cos(theta)))*(matrix(2,1,-2,5))}}}
{{{(matrix(2,1, x,y)) = (matrix(2,2,cos(-90),-sin(-90),sin(-90), cos(-90)))*(matrix(2,1,-2,5))}}}
{{{(matrix(2,1, 5,2)) = (matrix(2,2,0,1,-1, 0))*(matrix(2,1,-2,5))}}}.
The answer is (2), (5,2).