How are some of the values for cot2x=0 2x= 90, 270?

I understand that cotx= 1/tanx but I didnt know what to do from there as you can't do 1/0.

Any help would be great

Thanks

Printable View

- May 31st 2010, 07:26 AMgreghuntercot2x=0 trig problem
How are some of the values for cot2x=0 2x= 90, 270?

I understand that cotx= 1/tanx but I didnt know what to do from there as you can't do 1/0.

Any help would be great

Thanks - May 31st 2010, 07:47 AMnikhil
cot2x=0

1/tan2x=0

cos2x/sin2x=0

cos2x=0

2x=(2n+1)pi/2

x=(2n+1)pi/4

also if tan2x=1/0 then right hand side is not defined.

and the fact is that tan2x is undefined for odd values of pi/2

therefor

2x=(2n+1)pi/2 - May 31st 2010, 07:59 AMgreghunter
thanks man