# Matrices

• Ans: 3

• @shreyas-varma first thing is $f(x)$ must be a determinant. I think there is sum mistake as they hav given it as matrix.

For d soln: open det using 3rd row. U will directly get $cosBsinA-cosAsinB=sin(A-B)$ form.

U will get $f(x)=constant=f(0)=2$ in terms of $sin$ and $cos$

So the ques reduces to summation of 2 counted 31 times. So answer is $62$

Looks like your connection to dubbtr was lost, please wait while we try to reconnect.