Physics, asked by areeshabatool2356, 11 months ago

Two vectors A nd B are such that (A)=4 (B)=6 A-B=5. what does (A+B) equal?

Answers

Answered by sid590

5

|A-B|=5

A^2 + B^2 - 2A.B=25

16 + 36 -2A.B=25

27=2A.B

|A+B|=√(A^2+B^2+2A.B)=√(16+36+27)

=√79

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