The arm is usually positioned at a 45 degree angle.
You should point it at a 40 degree angle.
90 degree angle
SIMM
45 degree angle(:
So that the light path is correct.
The supplement of a 148-degree angle is a 32-degree angle.
The complement of a 55 degree angle is a 35 degree angle
A 12 degree angle is an acute angle.
A 90 degree angle is a right angle.
118 degree angle
A 22 degree angle is an acute angle
Im assuming you are asking at what angle should you inject using the IM method. Which is at a 90 degree angle.