+9 I know how to get the answer, but are we expected to know and memorize the different values of cosine and sin with radians. Like are we supposed to know what sin 7pi/4 without a calculator. Because the last step is (sin 7pi/4)/(cos 7pi/4). I have absolutely no idea what is going on right now.
pls help I might implode. And can you also give an explanation on how to solve the problem. thxx 0_o
