Produk untuk Sum / Perbedaan Kalkulator |
cosx cosy = (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)]
Misalnya, ketika u = 13 º, V = 17 º, sin (13) dosa (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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