, When x > 0, then x is equal to ______.
0
3
-2/3
None of these
tan -1n + cot -1 (n +1 ) is equal to ______.
cot -1 (n2 + n + 1 )
cot -1 (n2 -n+1 )
tan -1 (n2 + n + 1 )
Let f (x) = sec-1x + tan-1 x Then f (x) is real for
x∈[-1 , 1]
x∈ R
x∈ (-∞ , -1) ∪ [1 , ∞]
The value of is
1
is equal to
a/2
a3
a2-a +1
a2 + a -1
Solution of the equation?tan-1 (x -1 ) + tan -1x + tan -1 ( x + 1 ) = tan -1 3x is
x = 0
x= ± 1/2
x = ± 1/3
If
x > y and y2 = 1 - x
x < y
x > y and y2 = x
y2 = 1 + x
tan -1 1/5 + tan -1 1/7 + tan -1 1/3 + tan -1 1/8 is equal to ________.
π/3
π/4
π/2
π
