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![[Post New]](/templates/default/images/icon_minipost_new.gif) 27 Aug 2008 12:59:54 IST
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give the domain if cos(2x+1)is an onto function whose range is (-1,1) including 1,-1
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here
-1<=cos (2x+1) <= 1
cos-1(-1)<=2x+1<= cos-1(1)
 - 0 <= 2x+1 <= 0
 -1 < = 2x < = -1
[ -1 ] / 2 < = x < = -1 /2
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29 Aug 2008 10:28:36 IST
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Hello dear
the domain of Cos (nx) is R.
So domain of cos(2x+1) is also R.
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29 Aug 2008 12:38:50 IST
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DOMAIN is R since for every value R the value of cos(2x+1)
is between -1 and +1..
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IMPOSSIBLES ARE OFTEN UNTRIED... |
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