Very real question that totally exists

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

F(x)=x/2-2 and g(x)=2x^2+x-3 find (f+g)(x)

Which ordered pair is a solution to the system of linear equations? 2x + 3y= 6 –3x + 5y = 10