Question

(pre-cal/trig) I'm not sure how to verify the circled problems: http://img.ctrlv.in/img/14/05/30/5387d1d2cbff4.png

Help would be greatly appreciated :)

Answer 1

5) just break it out
\[\dfrac{1-tanx}{sinx}=\dfrac {1}{sinx}-\dfrac{tanx}{sinx}\] Hopefully you can see the link between the right hand side above is the right hand side of the problem.

Answer 2

7) again just break it out and convert to the required trigs.