I was studying online using a quizlet and I was trying to follow along the steps and understand the process. The problem is that I am not sure how the blue fractions were rewritten. My algebra may be a little rusty. Please explain the process. I'll attach the equations below.

. sin LB , t9 : 11m - 11m . 320 m {El+0 71' 5111 6 Rewrite the bLue fraction as shown below: _ 1_ sins: 1_ 1 _ $135 :1: 31310 71' [Sin 9/9)