HELLLP PLZ JUST GIVE THE ANSWERS

Which rule describes the composition of transformations that maps ajkl to aj"k"l"? ro. 900 o to, -2(x, y) to, -20 ro, 900(x, y) ro, 9000 t-2. o(x, y) t-2, 00 ro, 900(x, y)

Prove sin2a + cos2a - 1 / sin2a + cos2a + 1 = 1 - tana / 1 + cota

Let f(x) = 5/x and g(x)=2x2+5x. what two numbers are not in the domain of f o g