As stated above, putting a little more angle (vs perpendicular) will usually work.
But more angle can also provide some disadvantages when you're having deer coming from either direction (and commonly not known from which more), or when you're trying to monitor the point at which two trails intersect.
However, with your Browning cam, a full 45 degree angle may not be necessary, or you may be able to get by with less angle.
If you have your cam set to take only 1 or 2 pics per triggering, the solution could be simply programming your cam to take 3 or more pics per triggering. You didn't say which model you have, but mine have a setting to take 7 consecutive pics, which is allowing me to need less angle in my cam trap set-ups.
And if you're strictly monitoring trails (where the deer is expected to normally be walking by and not stopping), consider that "0" second interval setting, rather than the more commonly used settings such as 15 to 30-second intervals. This setting usually works better with lithium batteries.