|
|
|
|
|
| Author |
Message |
![[Post New]](/templates/default/images/icon_minipost_new.gif) 2 Apr 2008 23:46:04 IST
|
|
|
Q:If f(x)=max(sinx,cosx,1/2) then period of f(x)=
a.pi+pi/4 b.pi c.2pi+pi/4 d.2pi
ans:d-->2pi
Q:Period of function f(x)=cos2pi{2x}+sin2pi{2x}(where {.} denotes fractional part of x.
a.1 b.pi/2 c.1/2 d.pi
ans:c-->1/2
|
|
|
|
2 Apr 2008 23:51:38 IST
|
|
|
see for the second ques,.u know that period of fractional part is 1.
therefore u can rewrite the ques as
cos 4 pi + sin 4 pi
now period of cos 4 pi = 1/2 and period of sin 4pi = 1/2
common period is l.c.m. of above 2 periods which is 1/2
rate me !!!
|
all the best ... |
this reply: 0 points
(with 0 
in 0 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
3 Apr 2008 10:26:37 IST
|
|
|
for q.i, draw the graph of the function n u'll see for urself that it starts repeating itself after 2pi.
|
this reply: 0 points
(with 0
in 0 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
|
|
|
|
|
|
|
Moderation Team
![[Up]](/templates/default/images/icon_up.gif "[Up]"){kind=icon}
1
