Need help with a trig exam see document attached

Thank you.

Question

Need help with a trig exam, see document attached.

Thank you.

5.
1 x +0 y +2 z=−7→ x +2 z =−7
0 x+1 y +0 z=9 → y=9 z=t
x+ 2 z=−7 → x +2 t=−7 → x=−7−2t Solution: There are infinitely many solutions. The solutions are ( x , y , z )…
Trigonometry