π/3
π/4
π/2
π/6
If u = xy, then ∂u/∂x =
yxy-1
u log x
u log y
xyx-1
x/2
2x
3x
x
√2 - 1
3π/4
None of these
If sin -1 x + sin -1 y + sin -1 z = π thenx4 + y4 + 24 + 4x2 y2z2 = k ( x2y2+ y2z2 + z2x2 ), Where k is equal to ________.
1
2
4
-π
π
-π/2
Let f(x)= sec-1x + tan-1x. Then f(x) is real for
x∈[-1,1]
x∈R
x∈ (-∝,-1) ∪(1, +∝)
Cos (tan-1x) =
-1/√(1 + x2)
1/√(1 + x2)
1/√(1 - x2)
-1/√(1 - x2)
If Sin-1 x = π/5 for some x∈ [-1, 1] then the value of Cos-1 x is
3π/10
5π/10
7π/10
9π/10
The value of cot-1(-√3) is
-π/6
5π/6
-5π/6
