Question

If A = [cos theta -sin theta ] is the identity matrix then the value of theta is
1 . 60 degree
2. 30 degree
3. 0 degree
4. None of the above

Answer 1

Answer:

option 3. 0°

Step-by-step explanation:

A = [cos theta -sin theta ] is the identity matrix

identity matrix means value of matrix = 1

If we put 0° in the equation

then cos 0 = 1 & sin 0 = 0

so value of A = 1

please give 5 star if u understand