A. 5π/6
B. 5π/12
C. 7π/12
D. 7π/6
Sec-1√34/5+ Cosec-1√17 =
Tan [cos-1 4/5+tan-1 2/3] =
If Sec-1(x/a)- Sec-1(x/b)= Sec-1 b- Sec-1a then x=
Sin-1(sin 2π/3) =
sin-1(2cos2 x-1)cos-1(1-2sin2 x)
4 Tan-1 1/5- Tan-1 1/70+Tan-1 1/99 =
Tan (π/4+1/2cos-1a/b) +tan (π/4-1/2cos-1a/b) =
If 2Tan-1(cos x) = Tan-1(2 cosec x) then x=
Tan-1 1/3+ Tan-1 1/5+ Tan-1 1/7+ Tan-1 1/8 =
If Cosec-1 x= 2Cot-1 7+ Cos-1(3/4) then the value of x is