A) \[4sin{{h}^{3}}x-3sinh\text{ }x\]
B) \[3\text{ }sin{{h}^{3}}x+4\text{ }sinh\text{ }x\]
C) \[3\text{ }sinh\text{ }x+4\text{ }sin{{h}^{3}}x\]
D) \[3\text{ }sin{{h}^{3}}x-4\text{ }sinh\text{ }x\]
Correct Answer: C
Solution :
\[\sinh 3x=3\sinh x+4{{\sinh }^{3}}x\]
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