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Grade:

                        

let a,b,c be noncoplanar unit vectors equally inclined to one another at an acute angle k. then |[abc]| in terms of kis equal to A)(1+cosk)*root(cos2k) B)(1+cosk)*root(1-2cos2k) C)(1-cosk)*root(1+2cos2k) D)none of these

9 years ago

Answers : (1)

Pramod J AskiitiansExpert-IIT-B
36 Points
							

Dear student,

for k = 90 it becomes a cube of volume 1

option B and C satisfy it

for k = 0 volume is 0

Option C satisfies it

this implies C is the correct option

9 years ago
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