Given cos0=4/9 and csc0 < 0find sin0 and tan0

Matt and brian were solving a system of equations. they both noticed that the two lines had the same slope. brian said that because each line in the system had the same slope, the two lines had to be parallel, which meant the solution to the system was "no solution" matt disagreed, and said they should also look at the y-intercepts before determining how many solutions there were. who is correct?

The measurement of one angle of a right triangle is 34°. what is the measurement of the third angle?

Pls! does anybody know a shortcut for answering these types of questions in the future?