Plane sailing is a navigational method used over small ranges of latitude and longitude, based on the assumption that the meridian through the point of departure, the parallel through the destination, and the course line form a right triangle in a plane. The formula is tan C= p/l.
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You use the distance formula.
mirror formula = 1/v = 2/r = 1/v + 1/u this formula holds good for every type of mirror.
Answer: True
True
It is the square root of: (x1-x2)^2+(y1-y2)^2