Let a and b be vectors such that $| \mathbf { a } |$ = 2 and $| \mathbf { b } |$ = 3. Assume that the angle between a and b is $\frac { \pi } { 3 }$ . Find $| ( 2 \mathbf { a } + 3 \mathbf { b } ) \times ( \mathbf { a } + 4 \mathbf { b } ) |$ .

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The Answer of Let a and b be vectors such that $| \mathbf { a } |$ = 2 and $| \mathbf { b } |$ = 3. Assume that the angle between a and b is $\frac { \pi } { 3 }$ . Find $| ( 2 \mathbf { a } + 3 \mathbf { b } ) \times ( \mathbf { a } + 4 \mathbf { b } ) |$ .

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Let a and B Be Vectors Such That $| \mathbf { a } |$