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Nested sin and cos equality (Posted on 2023-06-05) Difficulty: 3 of 5
Consider this equation:

sin(sin(sin(sin(x))) = cos(cos(cos(cos(x)))

where x is a real number considered in radians.

Does there exist at least one solution to the given equation?

  • If so, provide all possible solutions to the given equation.
  • If not, prove, with valid reasoning that there does not exist any solution to the given equation.

See The Solution Submitted by K Sengupta    
Rating: 4.0000 (1 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)
re: computer solution Comment 2 of 2 |
(In reply to computer solution by Charlie)

This sentence links to a polar form of the graph.


Getting the radian markings took some research:


theta = linspace(0,2*pi);

rho = sin(sin(sin(sin(theta))));

rho2= cos(cos(cos(cos(theta))))

figure

polarplot(theta,rho)

hold on;

polarplot(theta,rho2)

title('Niested sin & cos')


pax=gca


thetaticks(0:45:315)


pax = gca;

pax.ThetaAxisUnits = 'radians';




Edited on June 6, 2023, 7:10 am
  Posted by Charlie on 2023-06-05 14:15:23

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