3. What is the cross-product of two unit vectors A = sin(100^o)i + cos(100^o)j and B = cos(20^o)i + sin(20^o)j

Answer: ..... i +...... j + ....... k

4. What is the cross-product of a unit vector A = sin(125^o)i +cos(125^o)j by a cross-product of vector A and a unit vector B = cos(55^o)i + sin(55^o)j

Answer: Ax(AxB) = ...... i + ....... j + ...... k

5. What is the dot-product of a unit vector A = sin(95^o)i + cos(95^o)j by a cross product of vector A and a unit vector B = sin(45^o)i + sin(45^o)j

Answer: A*(AxB) = .......

6. The sum of vectors A = 6i - 4j and B = -2i + 7j is vector C

Answer: C = ......i +.......j of magnitude ..... and direction ......

7. The difference between these vectors is vector D

Answer: D = A - B = ......i + .......j of magnitude ....... and direction ........