The pitch of your view angles (v.v_angle) is inverted from the angle of the vector from your origin to your enemies origin. The view pitch is also 1/3 of the angle between the enemies origin and your origin, thus...
Code:
Vector v = (enemy.origin - my.origin);
angle = VectorToAngles(v);
view_pitch = (-1 * angle.pitch) / 3;
botman