The angle of view

Determine the angle of view at which the observer sees a rod 16 m long when it is 18 m from one end and 27 m from the other.

Final Answer:

α =  34.9193 °

Step-by-step explanation:

a=16 m b=18 m c=27 m  a2 = b2+c2  2bc cos α  x = cos α  x=2 b ca2+b2+c2=2 18 27162+182+272=9727970.82  α=π180°arccosx=π180°arccos0.82=34.9193=34°5510"

Try calculation via our triangle calculator.




Help us improve the example. If you find a mistake, let us know. Thank you!







Tips for related online calculators
See also our right triangle calculator.
Cosine rule uses trigonometric SAS triangle calculator.
See also our trigonometric triangle calculator.
Try conversion angle units angle degrees, minutes, seconds, radians, grads.

You need to know the following knowledge to solve this word math problem:

planimetricsgoniometry and trigonometryUnits of physical quantitiesGrade of the word problem

 
We encourage you to watch this tutorial video on this math problem: video1   video2

Related math problems and questions: