qgis - How to form a V-Shape field of view from any given point (i.e. latitude longitude)

I want to visualize the V-Shape polygon which can be referred to field of view as well. So, far i have been able to find the latitude and longitude of a certain point when i give an input of latitude and longitude with some specific distance. So, what i have to do next in order to form a full field of view like shape ? I have been studying as well that i have to calculate some angles like azimuth and elevation e.t.c. I got stuck into this and i'm seeing no way out.