Detail solution
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Let .
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The derivative of sine is cosine:
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Then, apply the chain rule. Multiply by :
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Differentiate term by term:
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Apply the power rule: goes to
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The derivative of the constant is zero.
The result is:
The result of the chain rule is:
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Now simplify:
The answer is:
The first derivative
[src]
$$2 x \cos{\left(x^{2} - 1 \right)}$$
The second derivative
[src]
/ 2 / 2\ / 2\\
2*\- 2*x *sin\-1 + x / + cos\-1 + x //
$$2 \left(- 2 x^{2} \sin{\left(x^{2} - 1 \right)} + \cos{\left(x^{2} - 1 \right)}\right)$$
/ / 2\ 2 / 2\ 4 / 2\\
4*\- 3*sin\-1 + x / - 12*x *cos\-1 + x / + 4*x *sin\-1 + x //
$$4 \left(4 x^{4} \sin{\left(x^{2} - 1 \right)} - 12 x^{2} \cos{\left(x^{2} - 1 \right)} - 3 \sin{\left(x^{2} - 1 \right)}\right)$$
The third derivative
[src]
/ / 2\ 2 / 2\\
-4*x*\3*sin\-1 + x / + 2*x *cos\-1 + x //
$$- 4 x \left(2 x^{2} \cos{\left(x^{2} - 1 \right)} + 3 \sin{\left(x^{2} - 1 \right)}\right)$$