Hi all,

Struggling with three vector questions and would appreciate if someone could help me.

The roof is symmetrical

Determine the vectorsAB,BCandCAand in each case calculate the modulus.

Find the direction cosines ofABand hence calculate the angle (correct to 1 decimal place) betweenABand 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