What is the direction cosine of (1,1,-1) and (0,1,-1)

898.1666667

step-by-step explanation:

5389/6 = 898.1666667

m∠5 + m∠3 = m∠1   is true.

m∠5 + m∠6 = 180 is true

m∠2 +m∠3 = m∠6   is true

m∠2 +m∠3 +m∠5 = 180   is true

a.)the line for function b is steeper