Using Newton's method below: x_n+1=x_n−(f(xn))/(f′(x0)) using this chord formula where the chord length c is 1 cm: c=2rsin(θ/2) supposing the radius is 1.1 cm and the angle θ is unknown, show the iterative Newton's Method equation you would use to find an approximate value for θ in the context of this problem (using the appropriate function and derivative).

Emmy Swanson

Emmy Swanson

Answered question

2022-10-18

Using Newton's method below:
x n + 1 = x n f ( x n ) f ( x 0 )
using this chord formula where the chord length c is 1 cm:
c = 2 r sin θ 2
supposing the radius is 1.1 cm and the angle θ is unknown, show the iterative Newton's Method equation you would use to find an approximate value for θ in the context of this problem (using the appropriate function and derivative).

Answer & Explanation

Taxinov

Taxinov

Beginner2022-10-19Added 18 answers

work with
f ( x ) = c 2 r sin x 2 f ( x ) = r cos x 2
and indeed this equation has multiple solutions. You need to pick the one in the correct interval, what that is comes from additional knowledge about the geometrical situation. One could for instance ask for the smallest positive solution, which will be inside the interval [ 0 , π ] if 0 < c < 2 r.

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