Problem
Calculate the acute angle between two intersecting surfaces whose equations are as follows:
$$2x - 4y - z = -5$$
$$3x + 4y + 5z = -6$$
| A. 62.4° | C. 42.6° |
| B. 64.2° | D. 46.2° |
Advance Engineering Mathematics
Problem
Compute the value of b if A and B are orthogonal.
$${\bf A} = 2{\bf i} + b{\bf j} + {\bf k}$$
$${\bf B} = 4{\bf i} - 2{\bf j} - 2{\bf k}$$
| A. 6 | C. 4 |
| B. 5 | D. 3 |