Mathematics
10.03.2021 14:55
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Find the derivative of cos^4(5x^2)

Find the derivative of cos^4(5x^2)
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jenn4887
jenn4887
5,0(66 marks)

\displaystyle \frac{dy}{dx} = -40x \sin (5x^2) \cos^3 (5x^2)

General Formulas and Concepts:

Calculus

Differentiation

DerivativesDerivative Notation

Derivative Property [Multiplied Constant]:                                                           \displaystyle \frac{d}{dx} [cf(x)] = c \cdot f'(x)

Basic Power Rule:

f(x) = cxⁿf’(x) = c·nxⁿ⁻¹

Derivative Rule [Chain Rule]:                                                                                 \displaystyle \frac{d}{dx}[f(g(x))] =f'(g(x)) \cdot g'(x)

Step-by-step explanation:

Step 1: Define

Identify

\displaystyle y = \cos^4 (5x^2)

Step 2: Differentiate

Basic Power Rule [Derivative Rule - Chain Rule]:                                       \displaystyle y' = 4 \cos^3 (5x^2)[\cos (5x^2)]'Trigonometric Differentiation [Derivative Rule - Chain Rule]:                   \displaystyle y' = 4 \cos^3 (5x^2) \sin (5x^2) (5x^2)'Basic Power Rule [Derivative Property - Multiplied Constant]:                 \displaystyle y' = -40x \sin (5x^2) \cos^3 (5x^2)

Topic: AP Calculus AB/BC (Calculus I/I + II)

Unit: Differentiation

oomale
oomale
4,8(12 marks)

Yes it will be six

Step-by-step explanation:

because the negative 5 when is crosses the equal to symbol it becomes positive so x=6

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