Witch of the following equations have z=4
9z+22=26
7z-1=27
46-8z=14
5z+40=62

Tangent ? ) × cos /2 +? ) > 0. the answer is that cos ? < 0. i forgot to put the minus before. i get confusermd when i see questions similar to this when the radian is negative such as /2 i cant seem to solve it