Asked by Halifax
a cliff on the bank of a river is 250mm.if the angle of elevation of a point on the opposite side of the river is 50;find the width of the river
Answers
Answered by
mathhelper
Trying to make sense of your gibberish ....
Your cliff is 25 cm high??
anyway ....
if the width of the river is x cm
then tan50° = 25/x
x = 25/tan50 cm = 20.98 cm or appr 210 mm, using your units.
We must be living in Toyland, a river 21 cm wide !!!!
Your cliff is 25 cm high??
anyway ....
if the width of the river is x cm
then tan50° = 25/x
x = 25/tan50 cm = 20.98 cm or appr 210 mm, using your units.
We must be living in Toyland, a river 21 cm wide !!!!
Answered by
Anonymous
I can not follow this.
The cliff is two and a half meters high ? No way.
The angle of elevation of What Point? Looking up from the cliff?
The angle is 50 what? minutes? radians? degrees?
If a vertical cliff is 250 meters higher than you are and the angle you measure from horizontal to the top of it is 50 degrees then
tan 50 = 250/ x
where x is the horizontal distance from you to the cliff.
The cliff is two and a half meters high ? No way.
The angle of elevation of What Point? Looking up from the cliff?
The angle is 50 what? minutes? radians? degrees?
If a vertical cliff is 250 meters higher than you are and the angle you measure from horizontal to the top of it is 50 degrees then
tan 50 = 250/ x
where x is the horizontal distance from you to the cliff.
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