Answer:
Cosine rule formula
[tex]a^{2} = b^{2} + c^{2} - 2bc \times \cos( a) [/tex]
*the small a in cos represents the angle
Conditions
You can only do Cosine rule if the angle is in between the 2 lengths
a^2=22^2+27^2-2(22)(27)×cos(105)
a^2=1520.477026 * so sqaure root to find a
a=38.99329462 *to 2 d.p.
a=38.99ft
