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Формулы сложения
Математический диктант
| Question | Answer |
|---|---|
| sin(α+β) | sinα∙cosβ+sinβ∙cosα |
| cos(α-β) | cosα∙cosβ+sinα∙cosβ |
| cos(α+β) | cosα∙cosβ-sinα∙cosβ |
| sin(α-β) | sinα∙cosβ-cosα∙sinβ |
| tg(α+β) | (tgα+tgβ)/(1-tgα∙tgβ) |
| сtg(α+β) | (ctgα∙ctgβ-1)/(ctgα+ctgβ) |
| tg(α-β) | (tgα-tgβ)/(1+tgα∙tgβ) |
| сtg(α-β) | (ctgα∙ctgβ+1)/(ctgβ-ctgα) |
| tg2α | (2tgα)/(1-tgα^2) |
| sin2α | 2sinα∙cosα |
| cos2α | (cosα)^2-(sinα)^2 |
| сtg2α | (ctgα^2-1)/(2ctgα) |
Created by:
ktv68
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