Just for question 5. I got a reasonable angle, but when I put it in Pi form it gets weird. My answer for 5 was X= 47(Pi)/120 , 193(Pi)/120
Seems like such a strangle number to be, so I was hoping to check to see if it was right. I did try and desmos and they seem to agree, but I feel the need to check further, just in case.
Answer to question 5 is 1.231, 5.052 radians to 3d.p. (1 d.p. acceptable).
In calculator paper you can use decimal radians if not giving ‘common’ fractions of pi.