None of these
If , then x is ______.
a/2
a3
a2-a +1
a2 + a -1
The value of is
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
cos -1 ( 1/2 ) + 2 sin -1 ( 1/2 ) is equal to _______.
π/6
2π/3
Cosec-1 ( cos x ) is real, if :
x ∈ [ -1, 1 ]
x ∈ R
x is an odd multiple of π/2
x is a multiple of π
0
1
20
10
If sin ( sin -1 1/5 + cos -1 x ) = 1 then x is equal to __________.
4/5
1/5
