Question

Find the couterexemple to show that the equation 1-sinx = cos x is not an identity

Answer 1

identity holds for every value of the variable. put x=pi/4;
\[1-\frac{1}{\sqrt2} \neq \frac{1}{\sqrt2}\]

Answer 2

1 - sinx = cosx
1= sinx +cosx
x = pi/4

Answer 3

ty