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Pre Cal

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which of the expressions are identical?
a) cos^2x
b)(cosx)^2
c) cos (x^2)
d) (sinx)^-1
E) sin^-1 x
f) sin (x^-1)
g) 1/ sin x

  • Pre Cal -

    a , b

    it would also be 1 -sin^2 x
    but that is not listed :)

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