Answers

2016-01-28T20:38:42+05:30
We can form a right angle triangle
by keepin 30m as the base length , 45 degrees to be its adjacent angle and the height of the tree to be opposite height (h)
we can calculate h by : 
using  tan(45)=(h/30)                          as tan(45) = 1
           1=h/30
           h=30 meters 
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2016-01-30T14:37:30+05:30