Produkt zum Summen / Differenzrechner |
cosx cozy = (1/2) [cos (x - y) + cos (x + y)]
Sinx Cosy = (1/2) [Sin (x + y) + Sin (x - y)]
cosx siny = (1/2) [sin (x + y) - Sin [(x - y)]
SINX SINY = (1/2) [cos (x - y) - cos (x + y)]
Zum Beispiel, wenn u = 13 º, v = 17 º, sin (13) sin (17) = 0,065769, cos (13) cos (17) = 0.931795, sin (13) cos (17) = 0,215122, cos (13 ) SIN (17) = 0,284878.
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