Wow, messy
I used
http://www.math.hawaii.edu/lab/241/online-grapher.shtml
and the function
sin(2*x^3) - x
to get answers of x=0 and
x= appr. 0.75 and x = appr 0.97
I further fine-tuned the last two by trial and error and got
x = 0.7523 to get
LS = .7523
RS = .75229 , so that answer is correct to 4 decimals
I will let you do the same for the last approximation
t=sin(2*t^3)
get the t
2 answers
Btw, because of the symmetry of the function
x = appr -0.75 and x = appr. -0.97 would also work
x = appr -0.75 and x = appr. -0.97 would also work