If A = 5t2 I + t J – t3 K, B = sin t I – cos t J, find\(\frac{d}{{dt}}\left( {A.B} \right)\)

5t2 cos t + 11t sin t – cos t

If A = 5t2 I + t J – t3 K, B = sin t I – cos t J, find\(\frac{d}{{

1.	If A = 5t2 I + t J – t3 K, B = sin t I – cos t J, find\(\frac{d}{{dt}}\left( {A.B} \right)\)
A.	5t2 cos t + 9t sin t + cos t
B.	5t2 cos t + 11t sin t – cos t
C.	5t2 cos t + 11t sin t + cos t
D.	5t2 cos t + 9t sin t – cost
Answer» C. 5t2 cos t + 11t sin t + cos t

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If A = 5t2 I + t J – t3 K, B = sin t I – cos t J, find\(\frac{d}{{dt}}\left( {A.B} \right)\)

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