Question

let A=[2 3 -1 4] B=[5 2 7 4] C=[2 5 3 8] find the matrix D such that CD-AB=0​

Answer 1

Answer:

In a triangle ABC, C = 90', then the equation

whose roots are tanA, tanB is

1) ab x² + cx + ab = 0 2) ab x² + c x - ab=0

3) ab x? -c'x - ab = 0 4) ab x? -c-x + ab = 0