lighthouse operator
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lighthouse operator
The operator of the lighthouse on the point "P" 25 m above sea level, the sites of a sailboat under "S". (More. ..)
Od depression angle of observation is 10 degrees. How the boat from the base of the lighthouse? Add your answer to the nearest 10m. THIS IS TRIGONOMERTY
P | | | | | | B ------------------- ---- ------------------ 10 ----- S BS = angle of depression angle of elevation and angle 10 degrees PSB = DB = 25 m perpendicular = =? = Base then, as perpendicular = 10 / 0176 = base 25/BS Multiply both sides by BS 0176 BS = 25 Divide both sides by 0176 BS = BS = 25/0.176 distance of 142.045 boat from the base of the lighthouse = 142.05 = 142.1 m from the nearest distance of 10 m = 142 m
