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Questions  

If A=4i^+3j^  and B=2i^+5j^ and C=A×B , then the vector C  makes an angle of

a
450 with X axis
b
1800  with Y axis
c
00  with Z axis
d
1800  with Z axis

detailed solution

Correct option is D

A→=−4i^+3j^ ,B→=2i^+5j^ C→=A→×B→      =(−4i^+3j^)×(2i+5j)      =−20k^−6k^=−26k^ Hence C→  makes an angle of 1800  with Z- axis

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