tan(3*x - 4)*cos(x)
tan(3*x - 4)*cos(x)
Apply the product rule:
; to find :
Rewrite the function to be differentiated:
Apply the quotient rule, which is:
and .
To find :
Let .
The derivative of sine is cosine:
Then, apply the chain rule. Multiply by :
Differentiate term by term:
The derivative of a constant times a function is the constant times the derivative of the function.
Apply the power rule: goes to
So, the result is:
The derivative of the constant is zero.
The result is:
The result of the chain rule is:
To find :
Let .
The derivative of cosine is negative sine:
Then, apply the chain rule. Multiply by :
Differentiate term by term:
The derivative of a constant times a function is the constant times the derivative of the function.
Apply the power rule: goes to
So, the result is:
The derivative of the constant is zero.
The result is:
The result of the chain rule is:
Now plug in to the quotient rule:
; to find :
The derivative of cosine is negative sine:
The result is:
Now simplify:
The answer is:
/ 2 \ \3 + 3*tan (3*x - 4)/*cos(x) - sin(x)*tan(3*x - 4)
/ 2 \ / 2 \ -cos(x)*tan(-4 + 3*x) - 6*\1 + tan (-4 + 3*x)/*sin(x) + 18*\1 + tan (-4 + 3*x)/*cos(x)*tan(-4 + 3*x)
/ 2 \ / 2 \ / 2 \ / 2 \ sin(x)*tan(-4 + 3*x) - 9*\1 + tan (-4 + 3*x)/*cos(x) - 54*\1 + tan (-4 + 3*x)/*sin(x)*tan(-4 + 3*x) + 54*\1 + tan (-4 + 3*x)/*\1 + 3*tan (-4 + 3*x)/*cos(x)