Odpowiedź:
Szczegółowe wyjaśnienie:
tgα = 2/3
sinα/cosα = 2/3
sinα = 2/3cosα
(2cosα - sinα) / (sinα + 4cosα) =
= (4/3cosα) / (14/3cosα) =
= 4/3 * 3/14 =
= 4/14
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Odpowiedź:
Szczegółowe wyjaśnienie:
tgα = 2/3
sinα/cosα = 2/3
sinα = 2/3cosα
(2cosα - sinα) / (sinα + 4cosα) =
= (4/3cosα) / (14/3cosα) =
= 4/3 * 3/14 =
= 4/14