Trigformler

The exercise was created 2023-10-11 by Joelkrusen. Question count: 10.

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sin(u+v) sinu*cosv + cosu*sinv
sin(u-v) sinu*cosv - cosu*sinv
cos(u+v) cosu*cosv - sinu*sinv
cos(u-v) cosu*cosv + sinu*sinv
sin(2u) 2sinu*cosu
cos(2u) #1 cos²u - sin²u
cos(2u) #2 2cos²u - 1
cos(2u) #3 1 - 2sin²u
(1-cosu)/2 sin²(u/2)
(1+cosu)/2 cos²(u/2)

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https://spellic.com/eng/exercise/trigformler.11740401.html