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Grade: 12

                        

Question 9 is the question I want to ask you. It is from the Fiitjee package of vectors and of exercise 3.

2 years ago

Answers : (1)

sahil
142 Points
							sol: |A.B|=|abcos(¤)| and |A×B|=|absin(¤)| condition is |absin|=|abcos| or |sin|=|cos|where ¤ can tale value from 0 to 180degree.Now only 45 and 135 satisfy so option c is correct(since mod or psistive value is taken so 135 degree also satisfy)
						
2 years ago
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