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:cos-1(value)

Performs the Arccosine (Inverse Cosine) function on a value. It is affected by the Degree/Radian flag.

LocationEdit

TI-84

  • 2ND + cos( (cos{-1}}()

TI-89

  • ◇ + Z (cos-1)

TI-nspire

  • ctrl + cos (cos-1)

ExampleEdit

:Input "ANGLE",A
:cos(A)B
:Disp "cos(A)→B",B
:cos-1(B)→C
:Disp "cos-1(B),C

This asks for an angle. then is displays the cosine of that angle. Than it displays the arccosine of the cosine, hopefully showing equivalence of the original value and the newest value.

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