Hints: 1) 2x² -x - 1 = [by factoring] = (2x+1)(x-1).2) cos(3θ) = ? Do/comment these, unanon yourself, and then we will take it from there. Hopefully no one will spoil you the answers thereby depriving you from your personal enhancement; that would be very inconsiderate of them.

Anonymous

Anonymous asked in Science & Mathematics Mathematics · 1 month ago

Precalc help?

1 Answer

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rotchm
Lv 7
1 month ago
Hints:
1) 2x² -x - 1 = [by factoring] = (2x+1)(x-1).2) cos(3θ) = ?
Do/comment these, unanon yourself, and then we will take it from there.
Hopefully no one will spoil you the answers thereby depriving you from your personal enhancement; that would be very inconsiderate of them.

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