Question

Hey bro/sis.... Help me out in this question of matrices


And no rubbish answers​

Answer 1

After simply we get a unit matrix of order 2×2.

For this you have to follow these steps.

1. Take sin A and cos A inside the matrix (multiply them each member of the matrix)
2. Then add each individual term with its appropriate one.

Then you get the ans.

Have fun with calculation .