Secant is 1/cosine Rangeof cosine is(-1,1) Secant function cannot lie between (-1,1) So -0.43 is not in the rqnge of secant function Solution Secant is 1/cosine Rangeof cosine is(-1,1) Secant function cannot lie between (-1,1) So -0.43 is not in the rqnge of secant function.