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melvin davis 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

6 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

6 years ago
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