PVB of sin^-1
-Pi/2,Pi/2 closed interval
PVB of Cos^-1
0,Pi closed interval
PVB of Cosec^-1
-Pi/2,Pi/2 closed interval - set 0
PVB of Sec^-1
0,Pi closed interval - set Pi/2
PVB of Tan^-1
-Pi/2,Pi/2 open interval
PVB of Cot^-1
0,Pi open interval
Cosec^-1 [1/x]
Sin^-1x
Sec^-1 [1/x]
Cos^-1x
Cot^-1 [1/x]
Tan^1x
Sin^-1x + Cos^-1x
Pi/2
Sec^-1x + Cosec^-1x
Pi/2
Cot^-1x + Tan^1x
Pi/2
Tan^1x + Tan^1y
Tan^1 [ x+y/1-xy ]
Tan^1x - Tan^1y
Tan^1 [ x-y/1+xy ]
Tan [ pi/4+x ]
1 + Tan x / 1 - Tan x
Tan [ pi/4-x ]
1 - Tan x / 1 + Tan x