" 6) "tan^(-1)an+(1)/(2)sec^(-1)bx=pi/4

tan^(-1)ax+(1)/(2)sec^(-1)bx=(pi)/(4)

tan^(-1)sqrt(3)-sec^(-1)(-2)=(pi)/(3)

Prove that 2tan^(-1)((1)/(5)) +sec^(-1)((5sqrt(2))/(7)) +2tan^(-1)((1)/(8)) =(pi)/(4) .

Prove that 2tan^(-1)((1)/(5))+sec^(-1)((5sqrt(2))/(7))+2tan^(-1)((1)/(8))=(pi)/(4)

Prove that : 2 tan^(-1)""(1)/(5)+sec^(-1)""(5sqrt(2))/(7)+2tan^(-1)""(1)/(8)=(pi)/(4)

Prove that 2"tan"^(-1)(1/(5))+"sec"^(-1)((5sqrt(2))/(7))+2"tan"^(-1)(1/(8))=pi/(4) .

sum_(n=1)^(oo)(tan^(-1)((4n)/(n^(4)-2n^(2)+2))) is equal to ( A) tan^(-1)(2)+tan^(-1)(3)(B)4tan^(-1)(1)(C)(pi)/(2)(D)sec^(-1)(-sqrt(2))

Prove the following: 4tan^(-1)(1)/(5)-tan^(-1)(1)/(70)+tan^(-1)(1)/(99)=(pi)/(4)2tan^(-1)(1)/(5)+sec^(-1)(5sqrt(2))/(7)+2tan^(-1)(1)/(8)=(pi)/(4)

Prove that 2 tan ^(-1) (1/5)+sec ^(-1) ((5 sqrt2)/7)+2 tan ^(-1) (1/8)=pi/4

Prove that: 2(tan^(-1)1)/(5)+(sec^(-1)(5sqrt(2)))/(7)+2tan^(-1)(1)/(8)=(pi)/(4)