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Trigo
- 2. 1
Tg(x+y)= Cotg40°
Tg(x+y) = Cotg(90-x-y))
Sabiendo que...
Cotg(90-x-y)= Cotg40°
90-x-y=40
x+y=50°
x=40°
y=10°
Sen(x-y).Cosec30°=1
Sabiendo que...
x-y=30
x-y=30°