Question

Each expression simplifies to a constant, a single trigonometric function or a power of a trigometric function. Use fundamental identities to simplify each expression.
NOTE: The argument of the trig functions must be in parentheses (e.g. sin(x)).
1) [sin(x)tan(x)]/cos(x) =
2) (tan(x))^2+sin(x)csc(x) =
3) (sec(x))^2−1 =