Quick question: Derivative of a Trig Function

In summary, the general formula for finding the derivative of a trigonometric function is d/dx(sin(x)) = cos(x) and d/dx(cos(x)) = -sin(x). To find the derivative of a specific trigonometric function, you can use the general formula and trigonometric identities. The chain rule can also be used to find the derivative of a trigonometric function. There are some special cases, such as when the trigonometric function is raised to a power or inside an inverse function, where other rules may need to be applied. The product and quotient rules can also be used, but may require simplification and the use of the chain rule.
  • #1
momogiri
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Question
Find the derivative of the function. Simplify if possible.
y = sin-1(2x + 3)


I'm wondering if the derivative is as simple as [tex]\frac{1}{\sqrt{1-(2x+3)^{2}}}[/tex] XD
 
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  • #2
you forgot to multiply by (2x+3)'.

[tex](arcsinu)'=\frac{u'}{\sqrt{1-u^2}}[/tex]
 
  • #3
OMFG BOB YOU'RE BACCKKKKK <3333 XD
My assignment is already overdue, so I can't do anything now XD

So it'd be
[tex]\frac{(2x+3)'}{\sqrt{1-(2x+3)^{2}}}[/tex] to solve?
 
Last edited:
  • #4
Indeed, and it will hardly make the answer less simple :smile:
 

FAQ: Quick question: Derivative of a Trig Function

What is the general formula for finding the derivative of a trigonometric function?

The general formula for finding the derivative of a trigonometric function is: d/dx(sin(x)) = cos(x) and d/dx(cos(x)) = -sin(x). This means that for any trigonometric function, the derivative will be the original function with the trigonometric function switched and a negative sign added.

How do I find the derivative of a specific trigonometric function, such as tan(x)?

To find the derivative of a specific trigonometric function, you can use the general formula and the trigonometric identities to simplify the expression. For example, to find the derivative of tan(x), you can use the identity tan(x) = sin(x)/cos(x) and the quotient rule to find the derivative.

Can I use the chain rule to find the derivative of a trigonometric function?

Yes, the chain rule can be used to find the derivative of a trigonometric function. For example, if you have a trigonometric function within another function, you can use the chain rule to find the derivative of the outer function and then multiply it by the derivative of the inner function.

Are there any special cases when finding the derivative of a trigonometric function?

Yes, there are a few special cases when finding the derivative of a trigonometric function. One example is when the trigonometric function is raised to a power, in which case you can use the power rule to find the derivative. Another special case is when the trigonometric function is inside an inverse function, in which case you can use the inverse function rule to find the derivative.

Can I use the product and quotient rules to find the derivative of a trigonometric function?

Yes, the product and quotient rules can be used to find the derivative of a trigonometric function. However, you may need to use trigonometric identities to simplify the expression before using these rules. It is also important to remember to use the chain rule if the trigonometric function is inside another function.

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