How to find value of tan 10° ???????????????????????????

@ vaibhavi 
u can do it by graphical method . take a graph paper and draw a horizontal and vertical line at one cornor . 
from the end of horizontal line draw a line making angle of 10 degree . 
let it intersect the vertical line at a height . 
the tan 10 = height ( in mm ) / horizontal length in mm . 
see wheather this value matches the log table .. 
HOPE U UNDERSTAND . 
there is anathor way to calculate it ,but in that method it will become complicated . 
ALL THE BEST ..