Penyelesaian - Derivative

Hasil Akhir Langkah-langkah Terma dan topik

- \frac{\cos (x) \cot (x)}{\sin^{2} (x)} - \frac{\csc (x)}{\sin^{2} (x)}

- \frac{\cos{\left(x \right)} \cot{\left(x \right)}}{\sin^{2}{\left(x \right)}} - \frac{\csc{\left(x \right)}}{\sin^{2}{\left(x \right)}}

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1. Langkah 160: ringkaskan terbitan

Applying the product rule of derivatives.

$\frac{d}{d x} [\cot (x) \times \csc (x)] = \frac{d}{d x} [\cot (x)] \times \csc (x) + \cot (x) \times \frac{d}{d x} [\csc (x)]$

8 additional steps

Computing the derivative of a cotangent function.

$\frac{d}{d x} [\cot (x)] \times \csc (x) + \cot (x) \times \frac{d}{d x} [\csc (x)] = - \frac{1}{\sin {(x)}^{2}} \times \csc (x) + \cot (x) \times \frac{d}{d x} [\csc (x)]$

The cotangent of an angle is equal to the cosine of the angle divided by the sine of the angle.

$\frac{d}{d x} [\cot (x)] = \frac{d}{d x} [\frac{\cos (x)}{\sin (x)}]$

Computing the derivative of a fraction.

$\frac{d}{d x} [\frac{\cos (x)}{\sin (x)}] = \frac{\frac{d}{d x} [\cos (x)] \times \sin (x) - \cos (x) \times \frac{d}{d x} [\sin (x)]}{\sin {(x)}^{2}}$

Computing the derivative of a cosine function.

$\frac{\frac{d}{d x} [\cos (x)] \times \sin (x) - \cos (x) \times \frac{d}{d x} [\sin (x)]}{\sin {(x)}^{2}} = \frac{- \sin (x) \times \sin (x) - \cos (x) \times \frac{d}{d x} [\sin (x)]}{\sin {(x)}^{2}}$

Computing the derivative of a sine function.

$\frac{- \sin (x) \times \sin (x) - \cos (x) \times \frac{d}{d x} [\sin (x)]}{\sin {(x)}^{2}} = \frac{- \sin (x) \times \sin (x) - \cos (x) \times \cos (x)}{\sin {(x)}^{2}}$

Multiplying the same numbers together.

$\frac{- \sin (x) \times \sin (x) - \cos (x) \times \cos (x)}{\sin {(x)}^{2}} = \frac{- \sin {(x)}^{2} - \cos (x) \times \cos (x)}{\sin {(x)}^{2}}$

Multiplying the same numbers together.

$\frac{- \sin {(x)}^{2} - \cos (x) \times \cos (x)}{\sin {(x)}^{2}} = \frac{- \sin {(x)}^{2} - \cos {(x)}^{2}}{\sin {(x)}^{2}}$

Grouping negative terms together.

$\frac{- \sin {(x)}^{2} - \cos {(x)}^{2}}{\sin {(x)}^{2}} = \frac{- (\sin {(x)}^{2} + \cos {(x)}^{2})}{\sin {(x)}^{2}}$

The square of the sine of an angle plus the square of the cosine of the same angle is always equal to one.

$\frac{- (\sin {(x)}^{2} + \cos {(x)}^{2})}{\sin {(x)}^{2}} = \frac{- 1}{\sin {(x)}^{2}}$

Placing the minus sign in front of a fraction.

$\frac{- 1}{\sin {(x)}^{2}} = - \frac{1}{\sin {(x)}^{2}}$

2 additional steps

Computing the derivative of a cosecant function.

$- \frac{1}{\sin {(x)}^{2}} \times \csc (x) + \cot (x) \times \frac{d}{d x} [\csc (x)] = - \frac{1}{\sin {(x)}^{2}} \times \csc (x) + \cot (x) \times (- \frac{1}{\sin {(x)}^{2}} \times \cos (x))$

The cosecant of an angle is equal to one divided by the sine of the angle.

$\frac{d}{d x} [\csc (x)] = \frac{d}{d x} [\frac{1}{\sin (x)}]$

Computing the derivative of a reciprocal.

$\frac{d}{d x} [\frac{1}{\sin (x)}] = - \frac{1}{\sin {(x)}^{2}} \times \frac{d}{d x} [\sin (x)]$

Computing the derivative of a sine function.

$- \frac{1}{\sin {(x)}^{2}} \times \frac{d}{d x} [\sin (x)] = - \frac{1}{\sin {(x)}^{2}} \times \cos (x)$

Simplifying the arithmetic expressions.

$- \frac{1}{\sin^{2} (x)} \times \csc (x) + \cot (x) \times (- \frac{1}{\sin^{2} (x)} \times \cos (x)) = - \frac{\csc (x)}{\sin^{2} (x)} + \cot (x) \times (- \frac{1}{\sin^{2} (x)} \times \cos (x))$

Simplifying the arithmetic expressions.

$- \frac{\csc (x)}{\sin^{2} (x)} + \cot (x) \times (- \frac{1}{\sin^{2} (x)} \times \cos (x)) = - \frac{\csc (x)}{\sin^{2} (x)} + \cot (x) \times (- \frac{\cos (x)}{\sin^{2} (x)})$

Simplifying the arithmetic expressions.

$- \frac{\csc (x)}{\sin^{2} (x)} + \cot (x) \times (- \frac{\cos (x)}{\sin^{2} (x)}) = - \frac{\csc (x)}{\sin^{2} (x)} - \frac{\cos (x) \cot (x)}{\sin^{2} (x)}$