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Автор - milashka19911

найдите значения выражения sinLcosl,если sinL-cosL=1/3

Ответ

Автор - elizavetagatul

sinL-cosL=1/3⇒

(sinL-cosL)²=1/9⇒sin²L-2sinLcosL+cos²L=1/9⇒1-2sinLcosL=1/9⇒-2sinLcosL=1/9-1⇒-2sinLcosL=-8/9⇒sinLcosL=4/9

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