Cos^3+cos^3(630+A)
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given,
cos^3(A)+cos^3(630°+A)
cos^3(A)+cos^3(2π+(270+A))
cos^3(A)+cos^3(270+A)
cos^3(A)+sin^3(A)
hence the answer is cos^3(A)+sin^3(A)
cos^3(A)+cos^3(630°+A)
cos^3(A)+cos^3(2π+(270+A))
cos^3(A)+cos^3(270+A)
cos^3(A)+sin^3(A)
hence the answer is cos^3(A)+sin^3(A)
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