I'm stuck on the small part of this question which i've boxed in red. I understand (or thought i did) how to resolve a force into components of different directions, but i can't see how it has been resolved here.
For example; for the i component, i'd dot N and i giving Ncos(5pi/6), making the component of N in the i direction Ncos(5pi/6)i
I got 5pi/6 to be the angle between N and i using a couple of basic angle identities.
However the correct answer for the component of N in the i direction should be Nsin(pi/6)i
Same goes for the j component in that i got a different answer. Am i forgetting some identity or making a stupid mistake?
... and the ones that won't