How Do You Find the Derivatives of These Trigonometric Functions?

[nephi37]

find the derivatives

of differentiation of trigonometric functions

1. y=cos(3x^2+8x-2)

2. y=tan^3 2x

3. y=sin5x sin^5 x

4. y=Square root of 4sin^2x+9cos^2x

help here please..

i can't understand trigonometric functions

 

[SammyS]

Welcome to PF.

Please only post one or two questions per thread.

Show us what you've tried.

Where are you stuck?

 

[nephi37]

thank you summy

our teacher didn't teach us.. and don't have any idea to solve this..

Can u help me please, at least 2 of them :)

thank you very much

 

[SammyS]

The derivative of cos(x) is -sin(x) .

Do you know the chain rule?

 

[nephi37]

i don't have any background with that sammy

can u help me with number 3 and number 4

please help me.. its our assignment and will be pass tom :)

 

[HallsofIvy]

Excuse me? You have never been taught anything about derivatives of trig functions yet you are given an assignment like this? You should complain to your teacher's superior.

 

[nephi37]

yes. she didn't taught us.. because she will discuss it to us tomorrow..

please help me :)

 

[nephi37]

help plssss..

2 and 4 please.. I am searching in google..

but i can't get the logic..

im not good in math so please help...

 

[SammyS]

Do you know the chain rule.

Can you find the derivative of

(3x²+8x-2)^1/2 ?

 

[Hootenanny]

This thread is locked as a result of nephi37's refusal to follow our guidelines and provide an attempted solution.