sin∝-cos∝= 60/196
podnosimy do kwadratu
sin²∝-2sin∝cos∝+cos²∝=3600/38416
widzimy jedynkę trygonometryczną, więc zostaje:
-2sin∝cos∝+1=3600/38416
-2sin∝cos∝=3600/38416 - 38416/38416
-2sin∝cos∝= -34816/38416
(sin∝-cos∝)²=sin²∝-2sin∝cos∝+cos²∝=1-34816/38416= 3600/38416=225/2401
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sin∝-cos∝= 60/196
podnosimy do kwadratu
sin²∝-2sin∝cos∝+cos²∝=3600/38416
widzimy jedynkę trygonometryczną, więc zostaje:
-2sin∝cos∝+1=3600/38416
-2sin∝cos∝=3600/38416 - 38416/38416
-2sin∝cos∝= -34816/38416
(sin∝-cos∝)²=sin²∝-2sin∝cos∝+cos²∝=1-34816/38416= 3600/38416=225/2401