Lim cotg2x/cotg5x
X--0

Question

Lim cotg2x/cotg5x
X-->0

gorv · Answer

cotg means cot???

anonymous · Answer

ah yes

gorv · Answer

convert it into tan
and then use (tanx)/x=1 as x-->0

anonymous · Answer

that would be tan5x/tan2x.now what? i mean there is not x.

anonymous · Answer

Expand the denominator using double angle results.

anonymous · Answer

Wait, actually don't do that. Try rationalising using tan2x/tan2x.

anonymous · Answer

Bah, that doesn't work either. Where did you get this question from?

anonymous · Answer

Wait, just change tan2x into (sin2x)(cos2x)

anonymous · Answer

and then you get y=0

anonymous · Answer

Try it out and tell me whether you get that.

anonymous · Answer

(sin2x)/(cos2x)*

anonymous · Answer

a book of mine.i was thinking about deviding both with an x.and then it would be like (tan2x/x  and thhis devided by tan5x/x .and we know that tan2x/x is equal 2 and tan5x devided by x is 5 so it all equals 2/5 .what do u think?

anonymous · Answer

Read what I wrote above.

anonymous · Answer

Dang sorry, that doesn't work.

anonymous · Answer

Sorry tan2x/x does not equal 2.

anonymous · Answer

It's getting really late here, so I have to leave this with you. I'm sure someone else here will be glad to help you more than I did. Sorry about the inconvenience.

anonymous · Answer

its ok,thanks anyway]