Question

Lim cotg2x/cotg5x
X-->0

Answer 1

cotg means cot???

Answer 2

ah yes

Answer 3

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

Answer 4

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

Answer 5

Expand the denominator using double angle results.

Answer 6

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

Answer 7

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

Answer 8

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

Answer 9

and then you get y=0

Answer 10

Try it out and tell me whether you get that.

Answer 11

(sin2x)/(cos2x)*

Answer 12

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?

Answer 13

Read what I wrote above.

Answer 14

Dang sorry, that doesn't work.

Answer 15

Sorry tan2x/x does not equal 2.

Answer 16

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.

Answer 17

its ok,thanks anyway]