Help ! Mathematics Paper 4 one question

[Jade Nxy]

Pls help! i really couldn understand the marking scheme, this paper is 9702/41/0/n/10 Q3

 

[Komail Sabba']

View attachment 51589 Pls help! i really couldn understand the marking scheme, this paper is 9702/41/0/n/10 Q3

The identity 1+tan^2@=sec^2@ is from Pure Math3, however, you can use Lami's rule (Sine rule) and would get the same result.
I prefer resolving though.


And for W, Sub @ in 2 gives W=5.5tan(41.2) = 4.8N