Thursday

November 27, 2014

November 27, 2014

Posted by **Farah** on Monday, November 29, 2010 at 5:53am.

This is one of the questions in my practice test, I tried the basic equation of the trig function such as f(x)= sin(x) or f(x)=-sin(x) however in the fourth derivative they reach the same f(x) and the answer at the book says it is these and the cosine functions which will give the fifth derivative equal to the original equation. What is wrong with my working out?

- Math - derivative of sinusoidal (check) -
**Reiny**, Monday, November 29, 2010 at 8:51amy = sinx

y ' = cosx or dy/dx = cosx

y '' = -sinx

y ''' = -cosx

y '''' = sinx

y ''''' = cosx

so for y = sinx

the first derivative or dy/dx = cosx

and the fifth derivataive = cosx

so f(x) = sinx

**Answer this Question**

**Related Questions**

Calculus-Function - sketch the graph of a function in neighborhood x=2 that ...

math - Let f be a real value function and x Î Df then 0 lim ( ) ( ) h f x h f x...

CALCULUS HELP - Find the second derivative for the function 5x^3+60x^2-36x-41 ...

Calculus - R=M^2(c/2-m/3) dR/dM=CM-M^2 I found the derivative. Now how would I ...

Calc - a) y =ln(x-1) find dy/dx=? b) y=3 ln x - ln (1/x) where x >0, dy/dx...

Calculus--> bobpursley - How do you get m=0? from taking the second ...

Calculus derivative - find the slope m and an equation of the tangent line to ...

calculus - Differentiate both sides of the double angle identify sin 2x= 2 sin x...

calculus please help asap - true or false questions: a)The derivatives of the ...

Derivative Calculus - I just need my answers checked. 1) Find the derivative. f(...