For what value of x is the given parallelogram rhombus? I’ll mark the BRAINIEST

Can someone me i’m confused. will give brainliest and a whole bunch of points

Select the correct answer from each drop-down menu. a system of equations and its solution are given below. system a complete the sentences to explain what steps were followed to obtain the system of equations below. system b to get system b, the equation in system a was replaced by the sum of that equation and times the equation. the solution to system b the same as the solution to system a.]

Use the given information to determine the exact trigonometric value.