a) cos(7x3+6)
b) cosx
c) cos(x3)
d) \(cos(\frac{x^3+6}{7})\)
If f:R→R f(x)=cosx and g(x)=7x3+6, then fοg(x) is ______
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If f:R→R f(x)=cosx and g(x)=7x3+6, then fοg(x) is ______
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