3cotx+1=4. what is the solution set?
3cot(x) + 1 = 4
---> 3cot(x) = 3
---> cot(x) = 1
If cot(x) = a/b, then tan(x) = b/a
---> tan(x) = 1
---> x = tan-1(1)
---> x = 45o ± n·180°
Thanks Geno :)