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Standard IX

Mathematics

Multiplication of Polynomials

the magnitude...

Question

the magnitude of X and Y components of A (vector) are 7 and 6. also the magnitude of X and Y component of A (vector)+B(vector) are 11 and 9 respectively .what is the magnitude of B(vector)?

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Solution

A bolded notation is taken for indicating "vectors".
A= 7 i + 6 j
C=A+B=11i + 9j
B=C-A=(11i+9j)-(7i + 6j)
B= (11-7) i + (9-6)j
B= 4i + 3j

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the magnitude of X and Y components of A (vector) are 7 and 6. also the magnitude of X and Y component of A (vector)+B(vector) are 11 and 9 respectively .what is the magnitude of B(vector)?

A bolded notation is taken for indicating "vectors".A= 7 i + 6 jC=A+B=11i + 9jB=C-A=(11i+9j)-(7i + 6j)B= (11-7) i + (9-6)jB= 4i + 3j

A bolded notation is taken for indicating "vectors".
A= 7 i + 6 j
C=A+B=11i + 9j
B=C-A=(11i+9j)-(7i + 6j)
B= (11-7) i + (9-6)j
B= 4i + 3j