The expression $sin^2$ x + $cos^2$ x-1=0 is satisfied by how many values of x?
Answer : Option C
Explanation :
Given that, $sin^2$ x + $cos^2$ x-1=0
==> $sin^2$ x + $cos^2$x=1
which is an identity of trigonometric ratio and always true for every real value of x. Therefore, the equation has an infinite solution.
