Struggling with three vector questions and would appreciate if someone could help me.
The roof is symmetrical
Determine the vectors AB, BC and CA and in each case calculate the modulus.
Find the direction cosines of AB and hence calculate the angle (correct to 1 decimal place) between AB and each of the positive coordinate axes
Find all the angles (in degrees) in the triangle MDF, correct to 2 decimal places.
Obtain the outward unit normal vector to the sloping roof FGHC
Would really appreciate it