Which trigonometric ratios can be determined from the triangles? Select all that apply.

Given f(x) = 2x^2- 5x+1, determine the function value f(2). do not f(x) = in your answer

Could someone with number 1 and 2

1- what do you think the product of a nonzero rational number and an irrational number is? is it rational or irrational? make use of variables, the closure property of integers, and possibly a proof by contradiction to prove your hypothesis.2- why do we have to specify that the rational number must be nonzero when we determine what the product of a nonzero rational number and an irrational number is? if the rational number were 0, would it give us the same result we found in the first question?