Look at this figure. Which step should be taken next to construct a line parallel to AB

Sam claims that cos x =sin y if x and y are congruent angels. is sam correct ?

When using the linear combination metho e linear combination method to solve a system of linear equations, the four options are:

Ihave a triangle with a 60 degree angle. lets use d for that angle. what are the values of e and f if d is 60 degrees? and what do you notice about the values of e and f?