tan–1(1) + cos–1 
1
2
 
 
 −
 
 
 + sin–1 
1
2
 
 
 −
 
 
 
12 cos–1 1
2
 
 
 
 
 
 + 2 sin–1 1
2
 
 
 
 
 
 
13 If sin–1 x = y, then
(A) 0 ≤ y ≤ π
(B)
2
2
y
π
π
−
≤
≤
(C) 0 <  y < π
(D)
2
2
y
π
π
−
<
<
14 tan–1 
(
)
1
3
sec
2
−
−
−
 is equal to
(A) π
(B)
−π3
(C)
π3
(D) 2
3
π
2