1Can we do it by quadratic eqn method i.e is
x2+16x6+9x2 - 24x4 -1 = 0
and then dividing it by x3 to get a quadratic eqn .????????
This ques seems to be more of Algebra and less of trignometry.
10 Answers
1
62That will be too difficult to handle..
see the expression closely.. it is very much trigonometry..
341it will be ± cos π/4 and ±cos π/8. Is that what u r trying to say?
1sir but by assuming x=cos@ ....am i not restricting the domain of function
341it is for you to justify your choice then. :D
But again, I like your question.
So tell us what allows you to conclude that by setting x = cos θ we are not excluding any real solutions.
1like if i substitute so, x can never exceed 1.......if i had to substitute x as some tan or cot ,i wud happily do it...as they give all real values...