19there are 3 solutions to this equation,
x= 0, ∩/2 , -∩/2
5 Answers
1there are 2 solutions:
x= (2n-1)∩/2 ; here n is any integer..
n∩ ; here n is an multiple of 2.
19i am sure of my answer !!!....i donot get any logic behind the answer of saurabh 19!!!
111stly the qsn setter should've posted the interval in which he requires the ans....2ndly what saurabh has done is wrong, and no arguments pls, coz simple logic settles this....this eqn is basically equal to
cos^5x=(1+sin^2x)
(whenever cos x ≠0), draw the graph of both L.H.S and R.H.s to settle this, apart from that cosx=0 always settles this!
62You dont need the graph..
just observe that the RHS >=1 and the LHS is <=1
