If the scalar product of two vectors, $\overrightarrow { \mathrm { A } }$ and $\overrightarrow { \mathrm { C } }$ ,is equal to -3.5,if $| \overrightarrow { \mathbf { A } } | = 2.0$ ,and the angle between the two vectors when they are drawn starting from the same point is equal to 130$\degree$,what is the magnitude of $\overrightarrow { \mathrm { C } }$ ?
A)2.1
B)2.5
C)2.3
D)2.7
E)3.1

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The Answer of If the scalar product of two vectors, $\overrightarrow { \mathrm { A } }$ and $\overrightarrow { \mathrm { C } }$ ,is equal to -3.5,if $| \overrightarrow { \mathbf { A } } | = 2.0$ ,and the angle between the two vectors when they are drawn starting from the same point is equal to 130$\degree$,what is the magnitude of $\overrightarrow { \mathrm { C } }$ ?
A)2.1
B)2.5
C)2.3
D)2.7
E)3.1

If the Scalar Product of Two Vectors A→\overrightarrow { \mathrm { A } }A

If the Scalar Product of Two Vectors $\overrightarrow { \mathrm { A } }$