Question

Find the value of a for which the function f(x)=asin x+(1/3)sin 3x has an extremum at x=pi/3

Answer 1

@Mani_Jha , @apoorvk

Answer 2

that means at that point, i.e. pi/3 derivative of f(x) is zero.


so dy/dx = acosx + cos3x = 0 (at x=pi/3)

so, a/2 + (-1) = 0

or, a =2


Samjhe bhole?

Answer 3

2/sqrt(3) ??? i m not sure ...

Answer 4

?/

Answer 5

is der anything wrong with apoorv's wrking according to u @experimentX

Answer 6

looks like i got right value of cos 30

Answer 7

ya cos 30 is root3/2

Answer 8

pi/3 = 60 degrees.

Answer 9

Oo .. sorry, my mistake.

Answer 10

hehe u made a booboo

Answer 11

tht was simply gr8 @apoorv

Answer 12

great guys!!

Answer 13

oh that wasn't great at all really. :)