Level 1
Level 2

sumy i różnice


6 words 0 ignored

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cosaxcosb-sinaxsinb
cos(a+b)
cosaxcosb+sinaxsinb
cos(a-b)
sinaxcosb+sinbxcosa
sin(a+b)
sinaxcosb-cosaxsinb
cos(a-b)
2coskwadrata-1
cos2a
2xsinacosa
sin2a