Detail solution
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Let .
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Apply the power rule: goes to
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Then, apply the chain rule. Multiply by :
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The derivative of sine is cosine:
The result of the chain rule is:
The answer is:
The first derivative
[src]
-cos(x)
--------
2
sin (x)
$$- \frac{\cos{\left(x \right)}}{\sin^{2}{\left(x \right)}}$$
The second derivative
[src]
2
2*cos (x)
1 + ---------
2
sin (x)
-------------
sin(x)
$$\frac{1 + \frac{2 \cos^{2}{\left(x \right)}}{\sin^{2}{\left(x \right)}}}{\sin{\left(x \right)}}$$
The third derivative
[src]
/ 2 \
| 6*cos (x)|
-|5 + ---------|*cos(x)
| 2 |
\ sin (x) /
------------------------
2
sin (x)
$$- \frac{\left(5 + \frac{6 \cos^{2}{\left(x \right)}}{\sin^{2}{\left(x \right)}}\right) \cos{\left(x \right)}}{\sin^{2}{\left(x \right)}}$$