Oblicz wartość wyrażenia wiedząc, że ctg= -2
ctga = -2
cosa / sina = -2
cosa = -2sina
-3cosa + 6sina -3 * (-2sina) + 6sina 6sina + 6sina 12sina
---------------------= ------------------------------ = ---------------------- = ------------ = 12 / 2 = 6
8sina + 3cosa 8sina + 3 * (-2sina) 8sina - 6sina 2sina
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ctga = -2
cosa / sina = -2
cosa = -2sina
-3cosa + 6sina -3 * (-2sina) + 6sina 6sina + 6sina 12sina
---------------------= ------------------------------ = ---------------------- = ------------ = 12 / 2 = 6
8sina + 3cosa 8sina + 3 * (-2sina) 8sina - 6sina 2sina