Q7 E of 126 Page 129

Prove that:


To Prove:


Formula Used:


Proof:


LHS … (1)


Let


Therefore … (2)



From the figure,


… (3)


From (2) and (3),



Substituting in (1), we get


LHS





= tan-1 1



= RHS


Therefore, LHS = RHS


Hence proved.


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