# If a=i+j-3k and b=-+2j-3k then

### a.)Find the unit vector perpendicular to a and b .

b.)Is a x b equal to b x a ? Comment on result.

c.)Find the sine angle between a and b

d.)Find the area of parallelogram and triangle whose adjacent sides are a and b.

e.)Prove that a x b is perpendicular to both a and b.

Answers:

**Image Solution :**

This question is of class 12 Mathematics for posted in Twelveians website for all science student all over Nepal.

This type of question can be asked in Exam as a MCQ or in conceptual form.So Hope you get it and understand the concept.

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