If `e^(sinx)-e^(-sinx)-4=0`, then the number of real values of x is

e^(sinx)sin(e^(x))

(e^(x) sinx)/(secx)

the equation e^(sinx)-e^(-sinx)-4=0 has.

The equation e^(sinx)-e^(-sinx)-4=0 has (A) non real roots (B) integral roots (C) rational roots (D) real and unequal roots