I. Fill in each blank with the correct entry. Pick your answer from the box. one-to-one angles -1 The trigonometric function f(x) = sin x is also many-to-one. Remember that our and the sine of some angles are equal. For example, the sine - Another way to prove that it is not one-to-one is by It is obvious that its graph will fail because the inputs here are (4). values of and are both (5). subjecting its graph to the (6). line will intersect it at more than one point since it is (7). But, what if we the take only a part of its graph so that no value in the (8). is repeated? It is like restricting its (9). of its graph where x is from - to,would it still fail the test? Not anymore. to a smaller set. Say we only take the part Therefore, by defining the domain of y = sin x to be -