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Question		Answer
sin(α+β) start learning		sinαcosβ+sinβcosα
sin(α−β) start learning		sinαcosβ−sinβcosα
cos(α+β) start learning		cosαcosβ−sinαsinβ
cos(α−β) start learning		cosαcosβ+sinαsinβ
sin2α start learning		2sinαcosα
cos2α start learning		cos^2α−sin^2α
sin3α start learning		−4sin3α+3sinα
cos3α start learning		4cos3α−3cosα

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angielski

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