3sec inverse1/x-sin inverse(4x^3-3x) =?
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3 sec inverse 1 upon x minus sin inverse 4 x cube minus 3 x
put x = sin x
3 sec inverse one upon x + sin inverse 3 x minus 4 x cube
sin inverse 3 sin theta minus 4 sin cube theta
sin inverse sin 3 theta
3 theatre
3 sin inverse X
=3 sec inverse 1 upon X + 3 sin inverse X
= 3 cos inverse X + sin inverse X
=3π/2.❤️
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