If tan-1 x – tan-1 y = tan-1 A, then A is equal to
A. x – y
B. x + y
C. \(\frac{x-y}{1+x y}\)
D. \(\frac{x+y}{1-x y}\)
Answer:C
If tan-1 x – tan-1 y = tan-1 A, then A is equal to
A. x – y B. x + y C. \(\frac{x-y}{1+x y}\) D. \(\frac{x+y}{1-x y}\)