List of top Physics Questions on Vector basics asked in EAMCET

Given two vectors $ A\to =-\widehat{i}+2\widehat{j}-3\widehat{k} $ and $ B\to =4\widehat{i}+2\widehat{j}-6\widehat{k}. $ . The angle made by $ (A\to +B\to ) $ with x-axis is