12 Given 
6
4
3
1
2
3
x
y
x
x
y
z
w
w
z
w
+






=
+






−
+






, find the values of x, y, z and w Rationalised 2023-24
 60
MATHEMATICS
13 If 
cos
sin
0
F ( )
sin
cos
0
0
0
1
x
x
x
x
x
−




= 





, show that F(x) F(y) = F(x + y)