What rational number would u put infront of -(-4.2) to make the answer negative like u have to put a retinol number infront of the -(-4.2)

The equation respenting the left table is

To which sets of numbers does -12 belong? choose all answers that are correct. a) natural numbers b) integers c) real numbers d) irrational numbers

Find the exact value of each of the following. in each case, show your work and explain the steps you take to find the value. (a) sin 17π/6 (b) tan 13π/4 (c) sec 11π/3