Book: RS Aggarwal - Mathematics
Chapter: 4. Inverse Trigonometric Functions
Subject: Maths - Class 12th
Q. No. 6 E of Exercise 4C
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6 E
Prove that:
To Prove: 
Formula Used: 
Proof:
LHS = tan-1 2 – tan-1 1
= RHS
Therefore LHS = RHS
Hence proved.
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