00:01
So for this one, i want to go ahead and start by taking the derivative of f of x equals sine squared times tan x.
00:08
So this is going to be a product rule, which means we're going to take the derivative by first doing the first term times the derivative of the second term plus the second term, times the derivative of the first term.
00:37
Okay, so now we can simplify.
00:41
So i have sine of x squared, secant squared of x, plus 2x, tanx, cosine, x squared.
00:59
So i'm going to simplify that a little bit further by, you know, actually i don't think we can simplify that much further.
01:09
So let's just leave that as sine of x squared, secant squared of x, plus 2x, tan, x, cosine, x squared.
01:21
So that's the derivative of our first function.
01:27
Now for part b, we have sine squared of tan x for our function.
01:35
So f prime, we're going to use the chain rule.
01:38
So i'm going to start by rewriting my function as sine of tan x quantity squared.
01:47
So now we can see that the square is our outside function.
01:51
So i'm going to use power rule first and then chain rule.
01:56
So i need the derivative of sine of tan x, which is going to be cosine of tan x...