Question: hi trig function sample questions that i had a go...

Hi, Trig function sample questions that I had a go at. I particularily am not sure with q2 and q5 of it.

pics in google drive (had problems uploading here) Thanks

 

https://drive.google.com/drive/folders/1-byLNl0Zbaoz37dIFJV2siD8mxsteF7C?usp=sharing