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
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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
thanks man
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