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Big Sins

*z       ←→ (*x)×(cos y)j(sin y)
za*zb    ←→ * zb × ⍟za
sinh z   ←→ 0.5 × (*z) - *-z
cosh z   ←→ 0.5 × (*z) + *-z
tanh z   ←→ (sinh z)÷(cosh z)
sin z    ←→ -j sinh j z
cos z    ←→ cosh j z
tan z    ←→ (sin z)÷(cos z)
arcinv z ←→ * j z