Question

How to solve arctan 4/3 without calculator

Answer 1

first of all, you have to remember the values of 1/3 and 2/3 that are 0.3333... and 0.6666.... respectively .Now convert 4/3 into a mixed fraction (whole number along with a fracton).4/3 can be written as 3/3 +1/3ie. 1 +1/3.now we remember the value of 1/3, so add it  to 1, 1+ 0.333 =1.33333333........