Determine the reference angle for $=-\frac{19}{3}.$ What is the angle of least nonnegative measure coterminal with $?{}_C=$ d$.$ The expression $tan(\frac{4}{3})$ is equivalent to which of the following expressions? A$.-tan(\frac{}{3})$ B$.tan(\frac{}{3})$ C$.-tan(\frac{}{6})$ D$.tan(\frac{}{6})$ d$.$ The expression $tan(\frac{4}{3})$ is equivalent to which of the following expressions? A$.-tan(\frac{}{3})$ B$.tan(\frac{}{3})$ C$.-tan(\frac{}{6})$