x/2
2x
3x
x
Cos (tan-1x) =
-1/√(1 + x2)
1/√(1 + x2)
1/√(1 - x2)
-1/√(1 - x2)
-1
1
0
None of these
sin-1(sin5π/6)=_____________
5π/6
2π/6
3π/6
π/6
is equal to ______.
tan -1 xy
tan-1 x/y
tan -1 y/x
Let f(x)= sec-1x + tan-1x. Then f(x) is real for
x∈[-1,1]
x∈R
x∈ (-∝,-1) ∪(1, +∝)
√2 - 1
π/4
3π/4
π/3
π/2
1/x+ 1/y+1/z
xyz
xy+yz+zx
Sin-1 (-x)=
Cos x
-Sin-1 x
Sin-1 x
