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Calculus Examples
Step 1
Step 1.1
Differentiate.
Step 1.1.1
By the Sum Rule, the derivative of with respect to is .
Step 1.1.2
Differentiate using the Power Rule which states that is where .
Step 1.2
The derivative of with respect to is .
Step 2
Step 2.1
Differentiate.
Step 2.1.1
By the Sum Rule, the derivative of with respect to is .
Step 2.1.2
Since is constant with respect to , the derivative of with respect to is .
Step 2.2
The derivative of with respect to is .
Step 2.3
Subtract from .
Step 3
To find the local maximum and minimum values of the function, set the derivative equal to and solve.
Step 4
Subtract from both sides of the equation.
Step 5
Take the inverse cosine of both sides of the equation to extract from inside the cosine.
Step 6
Step 6.1
The exact value of is .
Step 7
The cosine function is negative in the second and third quadrants. To find the second solution, subtract the reference angle from to find the solution in the third quadrant.
Step 8
Subtract from .
Step 9
The solution to the equation .
Step 10
Evaluate the second derivative at . If the second derivative is positive, then this is a local minimum. If it is negative, then this is a local maximum.
Step 11
Step 11.1
Apply the reference angle by finding the angle with equivalent trig values in the first quadrant.
Step 11.2
The exact value of is .
Step 11.3
Multiply by .
Step 12
Step 12.1
Split into separate intervals around the values that make the first derivative or undefined.
Step 12.2
Substitute any number, such as , from the interval in the first derivative to check if the result is negative or positive.
Step 12.2.1
Replace the variable with in the expression.
Step 12.2.2
Simplify the result.
Step 12.2.2.1
The exact value of is .
Step 12.2.2.2
Add and .
Step 12.2.2.3
The final answer is .
Step 12.3
Substitute any number, such as , from the interval in the first derivative to check if the result is negative or positive.
Step 12.3.1
Replace the variable with in the expression.
Step 12.3.2
Simplify the result.
Step 12.3.2.1
Evaluate .
Step 12.3.2.2
Add and .
Step 12.3.2.3
The final answer is .
Step 12.4
Since the first derivative did not change signs around , this is not a local maximum or minimum.
Not a local maximum or minimum
Step 12.5
No local maxima or minima found for .
No local maxima or minima
No local maxima or minima
Step 13