Involving cos-1(z)
Involving cos-1(z) and sech-1(1/z)
Involving cos-1(z) and sech-1(-1/z)
Involving cos-1(z) and sech-1(1/1-2 z2)
Involving cos-1(z) and sech-1(1/2 z2-1)
Involving cos-1(z) and sech-1(21/2/(1+z)1/2)
Involving cos-1(z) and sech-1(2/1+z1/2)
Involving cos-1(z) and sech-1(21/2/(1-z)1/2)
Involving cos-1(z) and sech-1(2/1-z1/2)
Involving cos-1(z) and sech-1(1/(z2)1/2)
Involving cos-1(z) and sech-1(1/z21/2)
Involving cos-1(z) and sech-1(1/(1-z2)1/2)
Involving cos-1(z) and sech-1(1/1-z21/2)
Involving cos-1(z) and sech-1(1/2z (1-z2)1/2)
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